A bug with cover art not being displayed in winamp was discussed and marked as fixed in this thread: http://forums.mp3tag.de/index.php?act=Login&CODE=00
I'm seeing similar behavior with Mp3tag v2.45a and Winamp 5.56. Mp3Tag indicates that there is cover art, but it doesn't show up in winamp, nor do Windows Explore extensions such as AudioShell 1.3.5 indicate that there is cover art.
This doesn't always happen and I haven't determined yet the specific method of adding cover art that causes this. I could submit a sample mp3 if that would be useful.
Curious if this problem is unique to my setup.
BTW...this is my first post. Thanks Florian for such a great tool!