If I add an image (eyeD3 --add-image cover.jpg:OTHER filename.mp3; ID v2.3), then this image is not visible in iTunes (and in Finder). To be more precise, iTunes knows that there's an image (I can select it in the cover tab of the file info dialog), but it only shows as white square.
I've experimented a bit, and found out that eyeD3 creates an APIC frame with a length that it different from the one created by iTunes (and other tagging software that is compatible with iTunes).
Original file size: 143036 bytes
APIC created by eyeD3: 143053 bytes
APIC created by iTunes: 143050 bytes
Is this a known problem? If not, can I provide more information to help diagnosing this?