I had this annoying crash in Excel 2008 on the Mac when updating a pivot table. Probably started with one of their previous updates.
Anyway, I was just moaning about it, my auto-updates thing kicked in, it downloaded and installed the update. I relaunched my boring costs spreadsheet and hey presto I was able to update the pivot table without it crashing.
Cheers you guys at MacTopia. About time too.