This problem also started today on my system with 64 bit windows. The problem occurs when adding tags or other editing jpg file types in all the graphic programs i have on my machine. The problem only started today and has not been a problem in the last 3 years i have been using windows 7 including betas.
The files attributes are being changed by the operating system during system saves to being a hidden file type when it appears native windows 7 system calls are made, it isn't happening during inital file saves from my camera or scanner. Yes the files are viewable in win exploerer when the show hidden files is check in file and search options and files can be changed back to being standard files by manually changing the attributes but this shouldn't be happening at all. JPG files are not a reserved system file type that are typically hidden my windows to prevent them from being deleted by ignorant system users. Can anyone tell me what is going on?