MS Word documents open but aren't visible
I can open documents, either within Word or directly from my Documents folder, but when they open they aren't visible. I know that they are open because they appear on the list of open windows, both on the menu bar and from the dock. Once I've closed the documents down, they also appear on my Recent Items list under the Apple menu. Worse still, the problem has now spread to my MacBook Pro, so I'm wondering if the problem was caused by a recent software or security update.
I've tried everything that I can think of to fix this problem (changing the document view, using the arrange documents command under the Windows menu tab), short of reinstalling Office. I don't think that the documents are corrupted, as I get this problem with every Word document that I open (and they open fine in Pages).
Any suggestions to try and fix this problem would be gratefully received.
iMac 24", Mac OS X (10.5.1)