After using Windows Media Player, some of the files that i used to have from those times, have not supported data embedded in the file. It would be very useful if Jaikoz automatically stripped all that info for the users like me who don't need that non-standard info anymore...
This is Issue #439 on the enhnacement list.
For mp3s it easy enough to yourself however.
Go to the ID3 Edit tab
Scroll over to the 'Not Supported Fields' columns and select ( you can select mutliple rows)
Right click and select 'Delete'