I just upgraded Compass and Sass, and in the process I upgraded Ruby Gems to version 1.8. That seemed to work, but it did generate a ton of deprecation error messages that show anytime I run a gem or even list them. Annoying.
I found a partial solution. If you run
$ gem pristine --all --no-extensions it will regenerate your gem specifications safely.
This killed most of the screen vomit, but I’m still seeing messages for a few gems. Specifically fcgi, jk-ferret, json, and RedCloth. I’m honestly not sure why those are special, (or even what all of them do!), so I’m deciding in the short term that I can live with seeing these messages. Annoying.