How do I get my artwork back to normal!?

What did you do?

It's since I updated to 1.5.4? I downgraded to 1.5.3 hoping it would fix it.

Pulse seriously this is something I need sorting... Thousands of tracks with the wrong artwork is not good

Dealing with this issue on another thread, the engineers can best figure out what happened to the database if you're able to send us a copy. If it's under 20MB, you can email it to me direct, otherwise use Dropbox or another file-sharing service.