When you get your hands on 6.7, I suggest taking a look at sub elipsurl in ubb_lib...
It's not done by default, but it won't be too hard to turn on. Now that I think about it, I wonder why I put it in there... surely there's a reason. Figures. This is gonna bug me... *seeks*
*edit* Aha. Yes. The Transition page now properly shortens "Returning you to..." URL wording when they're too long. Transition also uses StandardHTML now... much nicer.