I created some m4a (aac) files using the latest version of the nero aac encoder. I'm able to play the files within Winamp. However, when I try tagging the files with mp3tag (latest version) using the convert filename to tag button, I receive the following error message:
"File xxx.m4a cannot be opened for writing"
As a quick test, I created the m4a file using FAAC and it worked fine. Is there a bug with a Nero encoded file?