Each of my users has a folder used for uploading PDFs to their web sites, so the permissions are set to 0777 (yes, all files being uploaded are thoroughly checked). For some reason the permissions on one user's folder keeps resetting back to 0755 randomly every few days. All the other user upload folders are fine. It seems to only be happening to this one user's folder. The user does not access cPanel or FTP, so I know it's not something he's doing.

Anybody have any idea why the folder permissions keep resetting to 0755 randomly? It is really annoying and the user is getting a little upset with this problem. Any help you could provide would be greatly appreciated.