> Exactly! It opens no problem in Acrobat reader, and the security settings look normal. The first page seems to be a picture, but why should that confuse T+?
I've never had this error, but I suspect that when *any* plug-in fails to load a file, you get the 'Digicam' error because that was the first plug-in and they haven't updated the error message to show the other plug-in names. Well, just a theory.
As to why this particular file didn't load.. heaven knows. You could try loading it into Ghostscript Viewer, maybe it will show a more detailed error. ThumbsPlus itself doesn't process the file, its plugin simply tells Ghostscript to turn it into a bitmap and then it loads the bitmap. Not all PDF files can be processed by Ghostscript, but the large majority can.