If you are using WMP 11 this is how i delete my album art
Have you tried right clicking on the song you wish to change the artwork
-->Advance Tag editor-->Select pictures tab--> Select the picture and then
this should remove the album art and then you can just copy and paste as you
would normally do in the main window.
> I like to use windows media player to organize my music but i like to do it
> myself. i found that if i want the files to show the album art i need to go
> and get it my self and paste it but i can't figure out how to change it... i
> tried to just paste over it but if i open the folders the music is in i still
> see the old art and so does itunes and other programs... does anyone know how
> i can get this fixed... i was hoping it would be easy with media player but
> it looks like its a bug i'm going to have to wait for them to fix.