Steps to reproduce:
1. Have some recordings processed. some of them go all the way through the procession to distribution, some fail.
2. Delete some of the failed recordings
At some point, some categories stopped showing the list of recordings. The buttons "All | Upcoming | Capturing | Processing", etc. are always present and showing the correct number of recordings in the corresponding category beside them between parentheses. However, the "All", "Processing", "Finished" and "Failed" do not even print the green title bar (that one that reads "Title | Presenter | Course / Series | Recording Date&Time | Status | Action"). The other categories ("Upcoming", "Capturing", etc) show it, even though they have zero recordings in it. Using firebug reveals no errors in the http messages, and no relevant log statements appear.
Workaround (if any):