I just upgrade today to MBC 3.0.96.0 and ROC 1.0.8.6.
Backgrounds show up just fine in all views expect for a detail view. I had MBC 3.0.90.0 and ROC 1.0.8.0 on another computer which I checked and the background were showing in detail view. I upgraded the second to MBC 3.0.96.0 and ROC 1.0.8.6 and the backgrounds disappeared. I rolled back ROC to 1.0.8.0 and the backgrounds reappeared.
I have to assume there is a problem with ROC 1.0.8.6 displaying backgrounds in Detail View. Coverflow view works fine.