I've got an Intel MacBook Pro running OS X version 10.4.9 here. I have about 200 folders inside of a photos folder. There are about 5 photos in each folder on the local hard drive. When I try to open a few of the sub folders finder just closes. If I copy the folders to a network share and remove the hidden ._ files from a Windows machine, then copy it back to the hdd it will be able to open them. It seems like it is somehow corrupting the files.
The majority of the folders are fine but it seems to be doing it to a lot of the subfolders and slowing down my photo guy.
I'm at a loss to explain it, best guess I have would be a hdd going bad, but that doesn't make sense since the photos themselves are fine and can be opened. It is also quite capable of copying, so perhaps it's some issue with indexing?