I was getting those mystery folders too and I saw that post.
I do have the Epson TWAIN plug-in installed. I'm pretty much running Photoshop CS3 Beta all the time now rather than CS2 and the folders seem to have stopped showing up.
I was just deleting them from time to time because they were empty. It was kind of a pain to search them out though because there was no pattern in the names.
Edit: Nope, they're still being created under CS3, I just double checked.