Just a suggestion, the new 0.7.6 Uniadmin has a whitelist of files that's tending to cause issues either uploading / processing addons. It may be more beneficial to have a blacklist for types of files that CAN'T be uploaded instead of a whitelist of files that CAN be uploaded.
Again, this is just a suggestion. If anyone has a good work-around or significant concern as to otherwise, please let me know.