Yep,
Same here it's really sad that w/ the most recent version of Service Pack it still does this.. I have office 2007 sp2 on windows 7 Enterprise RTM. When I had Windows 7 7600 applying SP2 Fixes the Issue. I have used multiple virus Scanners. ? for you man you opening off a network share or you opening it locally.
I also have seen this bahavior. Doesn't matter if the open is from a network or local source.
I usually just close the office app and then double click the document again, or use File-Open....
Pain in the backside....