On my PC the keyboard shortcuts for InDesign 5 and 5.5 have disappeared, the default setting is not available. ENTER and TAB have no effect, nor do the usual CTRL + keys. The program is still workin ok on my laptop.
There was a whole series of updates that came through this morning but they failed to solve the problem
I have looked at various forums and tried just about all that was suggested - NO luck yet!
Sounds like it might be this: InDesign tools and panels don't respond to mouse clicks (Windows 7/Vista)