Bodgery

Hi there - no idea what I've done, but whenever I right click on some cells in Excel 2003 (Win XP) the context menu that comes up is EMPTY! In fact it's just a little square! What on earth have I done?

I've even deleted and reintalled office to no effect. MS Word's right click menu still works fine - comes up with cut/copy/paste and all the other usuals.

Can anyone help? Might this be a registry issue?

Thanks...