Currently Being ModeratedOct 9, 2012 6:18 PM (in response to mracole)
I'm not sure on how to apply the techniques discussed in that thread.
How can I selectively delete some tracks from iCloud? and then re-upload them?
That way the album art will get updated.
Currently Being ModeratedOct 10, 2012 3:16 AM (in response to Aloke)
How can I selectively delete some tracks from iCloud?
First start with a secure backup of all of your Song files.
To delete from iCloud, you will have to delete a Song and select the option to also remove in iCloud.
and then re-upload them?
With iTunes Match off, importing Song files from your secure backup, refining Song data, then switch on Match.
Pending the Song in question, iTunes Match will initiate an upload when it completes its matching sequence.