you got a link to the vexxar stuff?? im curious and would like to have a look, if you do (or i'll just google it when i am not too busy...
about the MSoffice stuff. i wasn't really trying to compare them in the sense that you would have the 'exact' problems in both cases, more i was saying that i see 'similar' problems, several times a year, and this isn't 'exclusively' a mac problem. - as in i wouldn't say windows, or linux sucks over a similar issue...that was my point.
here is another example of the same sort of potential problem, in another application. Gimp supports TIFF, however, there are more than one kind of .tiff file - certain types /variants do not work in gimp, loading them will cause gimp to completely crash... it could be for some reason or another something in the files ins't compatible, just a thought.
my point being, sometimes formats aren't to the spec, or can have incompatibility issues, and require a simple work around - such as converting them / using another format. it often will solve the problem..