This is surely a bug as it doesn't occures in Windows Media Player
Add some mp3 files which have a large sized id3v2 tag and jetaudio takes a huge (I mean HUGE) amount of time to add it to the playlist. During this time jatAudio uses all the CPU power available. Moreover, after adding those files, jetaudio takes a long (5-15 secs) time to start playing those files.
Large sized id3v2 - I had a mp3 file with id3v2 tag which contained a BMP file rather than the usual JPG file.If you don't know, BMP files are very large compared to JPG files and id3v2 (not id3v1) tags are stored in the beginning of the mp3 files. So using a large BMP picture in a mp3 file moves the header position too much. To make it more clear,
say a mp3 file will have its header at
- 0 bytes when there's no tag.
- 290 bytes when there's a id3v2 tag.
- 30049 bytes when there's a id3v2 tag with a jpg picture.
- 349537 bytes when there's a same ppicture but in BMP.
So, 349536 byte is the size of id3v2 tag in this case and jatAudio fails to load this file instantly.
I've found that if I remove those BMP pictures from those mp3 files, everything turns to normal.

I don''t think anybody likes jetAudio's left/right click menus i.e. the popup menus (except the eq menu) as they always lags (1.5 secs) no matter how fast your computer is.

If next ver of jetAudio doesn't contains any upgrade in the album section, I think I'll smash it like people smashes their TV after the defeat of their favorite football team (But, It isn't a TV...)
If you have any resource editor like "resource hacker" try to look inside of
some of jetAudio's files (exe, dll) and see some unfinished album management portion like rating, mood etc.