I have a strange problem. It started occuring some time ago, and I was hoping it would get fixed, but it has survived several new versions, so I finally decided to report it. I select some files, change some tags and save. Suddenly all the tags go blank in some of the files! Often the first one, but sometimes several. If I exit, these tags are saved as blank. If I click on the files, the values of the tag come back!
I observed this behaviour when I have WMP and MP3tg running simultneaously and WMP updates the library (which is almost always the case).
If you add a network drive or a drive connected via USB, it becomes worse.
The remedies are: close the other program that access the same files and/or press F5 after each save to refresh.