Do you have any older versions of SS sitting around in a subfolder or something? This error could only happen due to mafia running an older version of SS than the current one.
There was one in the trash folder. I emptied the trash, and the problem went away.
Hmmm....
Perhaps the Mac is too persistent in maintaining links to items that move to the Trash?
Anyway, this might explain why I often have strange problems that mysteriously go away. I'll keep an eye on it.
Thanks again!
- Gdunge