I've had the same problem. I've strictly used "Get Info - Add Album Art" I've run into a few(maybe 2 in the last 100 cds) that iTunes wouldn't accept any artwork at all. Regardless of the image, size, etc. All are .jpg.
Not a big deal, but thought I'd toss out my part of this.
Also, thanks for the drag-drop tip, didn't realize I could do this.
I've had the same problem for files I copied from an mp3 cd. Then I realized that those files had the attribute "Read-only" and that's why Itunes couldnt attach the album art to them. Strange that Itunes didnt tell me that... Anyway, I changed the file attributes, and voila! everything worked.
Comments
Not a big deal, but thought I'd toss out my part of this.
Also, thanks for the drag-drop tip, didn't realize I could do this.