The HMAC-SHA1 signature generated is different for Ubuntu JAUNTY

[harpreetsingh13]

What steps will reproduce the problem?

1. Generate the HMAC-SHA1 signature with the string as "timestamp=07102011162458131&rand=0.5191447692923248" using any HMAC-SHA1 key on a windows machine and then on Ubuntu JAUNTY. You should see a difference in the signature generated.

What is the expected output? What do you see instead?
The signature generated on any machine should be the same for the same string and key used

Please use labels and text to provide additional information.
We encountered this issue with a user having the user agent listed in IIS logs as "Mozilla/5.0+(X11;+U;+Linux+i686;+en-US;+rv:1.9.0.19)+Gecko/2010040116+Ubuntu/9.04+(jaunty)+Firefox/3.0.19 200 0 0" We came to a conclusion that this is happening only for the user having ubuntu jaunty. This was working fine with another user using ubuntu lucid