Attachment_fu file perms

I have attachment_fu running for some photos and have 2 nagging problems
I can’t seem to resolve.

  1. I want to change the default file-mask attachment_fu uses on all the
    files it generates (original and thumbs) and didn’t know if there was a
    way to do it without actually invoking file ops from the ruby code (e.g.
    a flag I can set somewhere)

  2. When I set the processor to none and change the file-types allowed,
    then upload a file, it goes through then complains that it couldn’t find
    image_science (which of course I dont want it too because I set the
    processor to none)