Apparently there is a problem in the compass API for GB 2.3.3
Some apps using compass still work, but many don't.
Catch compass still works. So does google maps.
Among the one that don't are google sky map, mobile observatory live view, GPS Essentials compass, tricorder compass, and many others.
Somewhere along the line there is supposed to be a fix for the broken API (GB update). Anyone have a clue when that might happen?