I have yet to experience this problem. I normaly use my own build of C::B and so far I have never had a crash when saving Ogre_stlp.workspace (5 months going strong). I downloaded todays nightly build to test (since my builds are a little modified) and no problems saving the modified Ogre workspace (added and deleted a number of projects in the workspace).
So maybe it is an environment issue. What is your OS, are you using unicode or ansi build of WxWidgets, etc?