Set cover art types
In many tagging formats it's possible to set image "types", e.g. the front cover, back cover, picture of the CD, inserts etc.
In some cases, some music players actually require the type to be set to a specific value. Here's an example with the MyLink players inside General Motors cars where covers of type "other" are not supported:
AdminDan Gravell (Founder and programmer, bliss) shared this idea