It was Nikeas (@pimskeks) one of Chronic Dev Team who brought this update news for the first time telling the version 0.3 is ready to download brings bug fix and improvement of the previous version.
In the Absinthe 0.3 version for Mac and Windows you will find minor updates that touches on the tool stability, bug fix for Win32. And of course you don't have to upgrade to this version, as Nikias says on his tweet, that it only brings less important changes. But it's your choice.
Beside of that, now Absinthe is available for Linux OS. Therefore, now you can grab this jailbreak tool if you are using Linux.
Download Absinthe v0.3 for Mac OS X.
Download Absinthe v0.3 for Windows.
Download Absinthe v0.3 for Linux.
If your device has not been jailbreak yet, then visit this post to easily jailbreak iPhone 4s, iPad 2 untethered with Absinthe.