I wish they wouldn't change certain "features" between revisions.  A while ago I upgraded my in house (room) subversion server and a whole bunch of authentication rules I had no longer worked.  Turns out that the method I'd been using to setup rules was a very rarely used method for doing so and while efficient to setup they decided to remove it between versions and not include it in the changelog with proper references.  Ooops!  So, I just finished setting up new authorization rules so people can finally start checking code in properly (instead of just me) and we can get on with all the shenanigans.