Wims
I don't know what the actual problem is. That was just something I stumbled across when googling my problem and thought it could possibly be the cause.

Khaled
Thank you for looking into this. Here are 3 files, all 3 are CBR.

320 expected and 320 returned.
http://www.filehosting.org/file/details/470507/Angel%20-%20Tower.mp3

320 expected and 321 returned.
http://www.filehosting.org/file/details/470508/April%20Wine%20-%20Say%20Hello.mp3

256 expected and 257 returned. Also, this one has no ID3 tag.
http://www.filehosting.org/file/details/470510/Stevie%20Wonder%20-%20Ebony%20Eyes.mp3