I'm sticking this version number flag into the ground to bring attention to some crucial Jester updates. Namely, full compatibility with IE7, Safari, and Prototype 1.6. If you've been following Jester over on Github, or its SVN trunk, then you've already gotten these, some from as far back ago as January. There's not a whole lot past those compatibility fixes, but you can see what there is over at the commit list for Jester at Github, which naturally includes the commit history prior to Jester's migration from SVN.
Download a tarball of 1.6 (via Github), or check out the trunk in Git with:
git clone git://github.com/thoughtbot/jester.git.