The FitPro plugin breaks some of the Eclipse IDE's (I'm using Ganymede, 3.4.0) keyboard short-cuts when the designer is shown.
Repro:
Open up a fit test in the FitPro designer, then try ctrl-F7 or ctrl-tab. The designer seems to be swallowing those events that ought to be handled by Eclipse. CTRL-F6 works for some reason, along with ctrl-Z,W,S. I don't have a comprehensive list of what works/doesn't work.
This happens because the editor is actually an embedded browser with the FCK Editor in it.
Maybe there's a way for all unrecognized key strokes to be passed through to the backing editor.