diff --git a/archive/dustjs-helpers-1.5.0.tar.gz b/archive/dustjs-helpers-1.5.0.tar.gz
new file mode 100644
index 0000000..2ee9f5e
Binary files /dev/null and b/archive/dustjs-helpers-1.5.0.tar.gz differ
diff --git a/archive/dustjs-helpers-1.5.0.zip b/archive/dustjs-helpers-1.5.0.zip
new file mode 100644
index 0000000..aae0756
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diff --git a/dist/dust-helpers.js b/dist/dust-helpers.js
index c6d9e7e..aef2cfe 100644
--- a/dist/dust-helpers.js
+++ b/dist/dust-helpers.js
@@ -1,10 +1,21 @@
-/*! dustjs-helpers - v1.4.0
+/*! dustjs-helpers - v1.5.0
 * https://github.com/linkedin/dustjs-helpers
 * Copyright (c) 2014 Aleksander Williams; Released under the MIT License */
 (function(dust){
 
-//using the built in logging method of dust when accessible
-var _log = dust.log ? function(mssg) { dust.log(mssg, "INFO"); } : function() {};
+// Use dust's built-in logging when available
+var _log = dust.log ? function(msg, level) {
+  level = level || "INFO";
+  dust.log(msg, level);
+} : function() {};
+
+var _deprecatedCache = {};
+function _deprecated(target) {
+  if(_deprecatedCache[target]) { return; }
+  _log("Deprecation warning: " + target + " is deprecated and will be removed in a future version of dustjs-helpers", "WARN");
+  _log("For help and a deprecation timeline, see https://github.com/linkedin/dustjs-helpers/wiki/Deprecated-Features#" + target.replace(/\W+/g, ""), "WARN");
+  _deprecatedCache[target] = true;
+}
 
 function isSelect(context) {
   var value = context.current();
@@ -36,18 +47,17 @@ function filter(chunk, context, bodies, params, filterOp) {
       actualKey,
       expectedValue,
       filterOpType = params.filterOpType || '';
+
   // when @eq, @lt etc are used as standalone helpers, key is required and hence check for defined
-  if ( typeof params.key !== "undefined") {
+  if (params.hasOwnProperty("key")) {
     actualKey = dust.helpers.tap(params.key, chunk, context);
-  }
-  else if (isSelect(context)) {
+  } else if (isSelect(context)) {
     actualKey = context.current().selectKey;
     //  supports only one of the blocks in the select to be selected
     if (context.current().isResolved) {
       filterOp = function() { return false; };
     }
-  }
-  else {
+  } else {
     _log("No key specified for filter in:" + filterOpType + " helper ");
     return chunk;
   }
@@ -60,27 +70,24 @@ function filter(chunk, context, bodies, params, filterOp) {
     // we want helpers without bodies to fail gracefully so check it first
     if(body) {
      return chunk.render(body, context);
-    }
-    else {
-      _log("No key specified for filter in:" + filterOpType + " helper ");
+    } else {
+      _log("No body specified for " + filterOpType + " helper ");
       return chunk;
     }
-   }
-   else if (bodies['else']) {
+  } else if (bodies['else']) {
     return chunk.render(bodies['else'], context);
   }
   return chunk;
 }
 
-function coerce (value, type, context) {
-  if (value) {
-    switch (type || typeof(value)) {
+function coerce(value, type, context) {
+  if (typeof value !== "undefined") {
+    switch (type || typeof value) {
       case 'number': return +value;
       case 'string': return String(value);
-      case 'boolean': {
+      case 'boolean':
         value = (value === 'false' ? false : value);
         return Boolean(value);
-      }
       case 'date': return new Date(value);
       case 'context': return context.get(value);
     }
@@ -143,22 +150,23 @@ var helpers = {
     if (context.stack.index === context.stack.of - 1) {
       return chunk;
     }
-    if(body) {
-     return bodies.block(chunk, context);
-    }
-    else {
-     return chunk;
+    if (body) {
+      return body(chunk, context);
+    } else {
+      return chunk;
     }
   },
 
   "idx": function(chunk, context, bodies) {
     var body = bodies.block;
-     if(body) {
-       return bodies.block(chunk, context.push(context.stack.index));
-     }
-     else {
-       return chunk;
-     }
+    // Will be removed in 1.6
+    _deprecated("{@idx}");
+    if(body) {
+      return body(chunk, context.push(context.stack.index));
+    }
+    else {
+      return chunk;
+    }
   },
 
   /**
@@ -208,12 +216,16 @@ var helpers = {
     cond argument should evaluate to a valid javascript expression
    **/
 
-  "if": function( chunk, context, bodies, params ){
+  "if": function( chunk, context, bodies, params ) {
     var body = bodies.block,
-        skip = bodies['else'];
-    if( params && params.cond){
-      var cond = params.cond;
-      cond = dust.helpers.tap(cond, chunk, context);
+        skip = bodies['else'],
+        cond;
+
+    if(params && params.cond) {
+      // Will be removed in 1.6
+      _deprecated("{@if}");
+
+      cond = dust.helpers.tap(params.cond, chunk, context);
       // eval expressions with given dust references
       if(eval(cond)){
        if(body) {
diff --git a/dist/dust-helpers.min.js b/dist/dust-helpers.min.js
index 3bc4b70..8fd292a 100644
--- a/dist/dust-helpers.min.js
+++ b/dist/dust-helpers.min.js
@@ -1,4 +1,4 @@
-/*! dustjs-helpers - v1.4.0
+/*! dustjs-helpers - v1.5.0
 * https://github.com/linkedin/dustjs-helpers
 * Copyright (c) 2014 Aleksander Williams; Released under the MIT License */
-!function(dust){function isSelect(a){var b=a.current();return"object"==typeof b&&b.isSelect===!0}function jsonFilter(a,b){return"function"==typeof b?b.toString().replace(/(^\s+|\s+$)/gm,"").replace(/\n/gm,"").replace(/,\s*/gm,", ").replace(/\)\{/gm,") {"):b}function filter(a,b,c,d,e){d=d||{};var f,g,h=c.block,i=d.filterOpType||"";if("undefined"!=typeof d.key)f=dust.helpers.tap(d.key,a,b);else{if(!isSelect(b))return _log("No key specified for filter in:"+i+" helper "),a;f=b.current().selectKey,b.current().isResolved&&(e=function(){return!1})}return g=dust.helpers.tap(d.value,a,b),e(coerce(g,d.type,b),coerce(f,d.type,b))?(isSelect(b)&&(b.current().isResolved=!0),h?a.render(h,b):(_log("No key specified for filter in:"+i+" helper "),a)):c["else"]?a.render(c["else"],b):a}function coerce(a,b,c){if(a)switch(b||typeof a){case"number":return+a;case"string":return String(a);case"boolean":return a="false"===a?!1:a,Boolean(a);case"date":return new Date(a);case"context":return c.get(a)}return a}var _log=dust.log?function(a){dust.log(a,"INFO")}:function(){},helpers={tap:function(a,b,c){if("function"!=typeof a)return a;var d,e="";return d=b.tap(function(a){return e+=a,""}).render(a,c),b.untap(),d.constructor!==b.constructor?d:""===e?!1:e},sep:function(a,b,c){var d=c.block;return b.stack.index===b.stack.of-1?a:d?c.block(a,b):a},idx:function(a,b,c){var d=c.block;return d?c.block(a,b.push(b.stack.index)):a},contextDump:function(a,b,c,d){var e,f=d||{},g=f.to||"output",h=f.key||"current";return g=dust.helpers.tap(g,a,b),h=dust.helpers.tap(h,a,b),e="full"===h?JSON.stringify(b.stack,jsonFilter,2):JSON.stringify(b.stack.head,jsonFilter,2),"console"===g?(_log(e),a):(e=e.replace(/</g,"\\u003c"),a.write(e))},"if":function(chunk,context,bodies,params){var body=bodies.block,skip=bodies["else"];if(params&&params.cond){var cond=params.cond;if(cond=dust.helpers.tap(cond,chunk,context),eval(cond))return body?chunk.render(bodies.block,context):(_log("Missing body block in the if helper!"),chunk);if(skip)return chunk.render(bodies["else"],context)}else _log("No condition given in the if helper!");return chunk},math:function(a,b,c,d){if(d&&"undefined"!=typeof d.key&&d.method){var e=d.key,f=d.method,g=d.operand,h=d.round,i=null;switch(e=dust.helpers.tap(e,a,b),g=dust.helpers.tap(g,a,b),f){case"mod":(0===g||g===-0)&&_log("operand for divide operation is 0/-0: expect Nan!"),i=parseFloat(e)%parseFloat(g);break;case"add":i=parseFloat(e)+parseFloat(g);break;case"subtract":i=parseFloat(e)-parseFloat(g);break;case"multiply":i=parseFloat(e)*parseFloat(g);break;case"divide":(0===g||g===-0)&&_log("operand for divide operation is 0/-0: expect Nan/Infinity!"),i=parseFloat(e)/parseFloat(g);break;case"ceil":i=Math.ceil(parseFloat(e));break;case"floor":i=Math.floor(parseFloat(e));break;case"round":i=Math.round(parseFloat(e));break;case"abs":i=Math.abs(parseFloat(e));break;default:_log("method passed is not supported")}return null!==i?(h&&(i=Math.round(i)),c&&c.block?a.render(c.block,b.push({isSelect:!0,isResolved:!1,selectKey:i})):a.write(i)):a}return _log("Key is a required parameter for math helper along with method/operand!"),a},select:function(a,b,c,d){var e=c.block;if(d&&"undefined"!=typeof d.key){var f=dust.helpers.tap(d.key,a,b);return e?a.render(c.block,b.push({isSelect:!0,isResolved:!1,selectKey:f})):(_log("Missing body block in the select helper "),a)}return _log("No key given in the select helper!"),a},eq:function(a,b,c,d){return d?(d.filterOpType="eq",filter(a,b,c,d,function(a,b){return b===a})):a},ne:function(a,b,c,d){return d?(d.filterOpType="ne",filter(a,b,c,d,function(a,b){return b!==a})):a},lt:function(a,b,c,d){return d?(d.filterOpType="lt",filter(a,b,c,d,function(a,b){return a>b})):a},lte:function(a,b,c,d){return d?(d.filterOpType="lte",filter(a,b,c,d,function(a,b){return a>=b})):a},gt:function(a,b,c,d){return d?(d.filterOpType="gt",filter(a,b,c,d,function(a,b){return b>a})):a},gte:function(a,b,c,d){return d?(d.filterOpType="gte",filter(a,b,c,d,function(a,b){return b>=a})):a},"default":function(a,b,c,d){return d&&(d.filterOpType="default"),filter(a,b,c,d,function(){return!0})},size:function(a,b,c,d){var e,f,g,h=0;if(d=d||{},e=d.key,e&&e!==!0)if(dust.isArray(e))h=e.length;else if(!isNaN(parseFloat(e))&&isFinite(e))h=e;else if("object"==typeof e){f=0;for(g in e)Object.hasOwnProperty.call(e,g)&&f++;h=f}else h=(e+"").length;else h=0;return a.write(h)}};for(var key in helpers)dust.helpers[key]=helpers[key];"undefined"!=typeof exports&&(module.exports=dust)}("undefined"!=typeof exports?require("dustjs-linkedin"):dust);
\ No newline at end of file
+!function(dust){function _deprecated(a){_deprecatedCache[a]||(_log("Deprecation warning: "+a+" is deprecated and will be removed in a future version of dustjs-helpers","WARN"),_log("For help and a deprecation timeline, see https://github.com/linkedin/dustjs-helpers/wiki/Deprecated-Features#"+a.replace(/\W+/g,""),"WARN"),_deprecatedCache[a]=!0)}function isSelect(a){var b=a.current();return"object"==typeof b&&b.isSelect===!0}function jsonFilter(a,b){return"function"==typeof b?b.toString().replace(/(^\s+|\s+$)/gm,"").replace(/\n/gm,"").replace(/,\s*/gm,", ").replace(/\)\{/gm,") {"):b}function filter(a,b,c,d,e){d=d||{};var f,g,h=c.block,i=d.filterOpType||"";if(d.hasOwnProperty("key"))f=dust.helpers.tap(d.key,a,b);else{if(!isSelect(b))return _log("No key specified for filter in:"+i+" helper "),a;f=b.current().selectKey,b.current().isResolved&&(e=function(){return!1})}return g=dust.helpers.tap(d.value,a,b),e(coerce(g,d.type,b),coerce(f,d.type,b))?(isSelect(b)&&(b.current().isResolved=!0),h?a.render(h,b):(_log("No body specified for "+i+" helper "),a)):c["else"]?a.render(c["else"],b):a}function coerce(a,b,c){if("undefined"!=typeof a)switch(b||typeof a){case"number":return+a;case"string":return String(a);case"boolean":return a="false"===a?!1:a,Boolean(a);case"date":return new Date(a);case"context":return c.get(a)}return a}var _log=dust.log?function(a,b){b=b||"INFO",dust.log(a,b)}:function(){},_deprecatedCache={},helpers={tap:function(a,b,c){if("function"!=typeof a)return a;var d,e="";return d=b.tap(function(a){return e+=a,""}).render(a,c),b.untap(),d.constructor!==b.constructor?d:""===e?!1:e},sep:function(a,b,c){var d=c.block;return b.stack.index===b.stack.of-1?a:d?d(a,b):a},idx:function(a,b,c){var d=c.block;return _deprecated("{@idx}"),d?d(a,b.push(b.stack.index)):a},contextDump:function(a,b,c,d){var e,f=d||{},g=f.to||"output",h=f.key||"current";return g=dust.helpers.tap(g,a,b),h=dust.helpers.tap(h,a,b),e="full"===h?JSON.stringify(b.stack,jsonFilter,2):JSON.stringify(b.stack.head,jsonFilter,2),"console"===g?(_log(e),a):(e=e.replace(/</g,"\\u003c"),a.write(e))},"if":function(chunk,context,bodies,params){var body=bodies.block,skip=bodies["else"],cond;if(params&&params.cond){if(_deprecated("{@if}"),cond=dust.helpers.tap(params.cond,chunk,context),eval(cond))return body?chunk.render(bodies.block,context):(_log("Missing body block in the if helper!"),chunk);if(skip)return chunk.render(bodies["else"],context)}else _log("No condition given in the if helper!");return chunk},math:function(a,b,c,d){if(d&&"undefined"!=typeof d.key&&d.method){var e=d.key,f=d.method,g=d.operand,h=d.round,i=null;switch(e=dust.helpers.tap(e,a,b),g=dust.helpers.tap(g,a,b),f){case"mod":(0===g||g===-0)&&_log("operand for divide operation is 0/-0: expect Nan!"),i=parseFloat(e)%parseFloat(g);break;case"add":i=parseFloat(e)+parseFloat(g);break;case"subtract":i=parseFloat(e)-parseFloat(g);break;case"multiply":i=parseFloat(e)*parseFloat(g);break;case"divide":(0===g||g===-0)&&_log("operand for divide operation is 0/-0: expect Nan/Infinity!"),i=parseFloat(e)/parseFloat(g);break;case"ceil":i=Math.ceil(parseFloat(e));break;case"floor":i=Math.floor(parseFloat(e));break;case"round":i=Math.round(parseFloat(e));break;case"abs":i=Math.abs(parseFloat(e));break;default:_log("method passed is not supported")}return null!==i?(h&&(i=Math.round(i)),c&&c.block?a.render(c.block,b.push({isSelect:!0,isResolved:!1,selectKey:i})):a.write(i)):a}return _log("Key is a required parameter for math helper along with method/operand!"),a},select:function(a,b,c,d){var e=c.block;if(d&&"undefined"!=typeof d.key){var f=dust.helpers.tap(d.key,a,b);return e?a.render(c.block,b.push({isSelect:!0,isResolved:!1,selectKey:f})):(_log("Missing body block in the select helper "),a)}return _log("No key given in the select helper!"),a},eq:function(a,b,c,d){return d?(d.filterOpType="eq",filter(a,b,c,d,function(a,b){return b===a})):a},ne:function(a,b,c,d){return d?(d.filterOpType="ne",filter(a,b,c,d,function(a,b){return b!==a})):a},lt:function(a,b,c,d){return d?(d.filterOpType="lt",filter(a,b,c,d,function(a,b){return a>b})):a},lte:function(a,b,c,d){return d?(d.filterOpType="lte",filter(a,b,c,d,function(a,b){return a>=b})):a},gt:function(a,b,c,d){return d?(d.filterOpType="gt",filter(a,b,c,d,function(a,b){return b>a})):a},gte:function(a,b,c,d){return d?(d.filterOpType="gte",filter(a,b,c,d,function(a,b){return b>=a})):a},"default":function(a,b,c,d){return d&&(d.filterOpType="default"),filter(a,b,c,d,function(){return!0})},size:function(a,b,c,d){var e,f,g,h=0;if(d=d||{},e=d.key,e&&e!==!0)if(dust.isArray(e))h=e.length;else if(!isNaN(parseFloat(e))&&isFinite(e))h=e;else if("object"==typeof e){f=0;for(g in e)Object.hasOwnProperty.call(e,g)&&f++;h=f}else h=(e+"").length;else h=0;return a.write(h)}};for(var key in helpers)dust.helpers[key]=helpers[key];"undefined"!=typeof exports&&(module.exports=dust)}("undefined"!=typeof exports?require("dustjs-linkedin"):dust);
\ No newline at end of file
diff --git a/package.json b/package.json
index c076592..e141c84 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dustjs-helpers",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "author": {
     "name": "Aleksander Williams",
     "url": "http://akdubya.github.com/dustjs"