For some odd reason, I cannot delete characters on my WinXP instance (backspace does nothing, moving my arrows on the keyboard does nothing). I can type, and tab, but thats about it. I have uninstalled and re-installed just in case I have a preference that is fubared but that did not matter. (I also deleted the preferences in Application Data. Still nothing.)
Windows XP Service Pack 3
Is there any other data that you need?