Warning: SUID file "System/Library/CoreServices/Finder.app/Contents/Resources/OwnerGroupTool" has been modified and will not be repaired. I got this in disk utility and not quite sure what it means.
I get the same warning and my MBP is fine! Don't worry. I also read in Apples support site that when you get those warnings you don't have to be afraid! They are normal!
It's just a bug in leopard. Apple has stated that these files do not need to be repaired. You can google suid files for more information if you're curious.