Camera still hangs under extensive use and in landscape. This is seemingly related to focussing. The gallery crashed a few times while trying to save a picture after editing. One it produced a broken image file. The HDR camera app hangs regularly when taking the second or third shots for further processing while autofocus is disabled...
I'm thinking now these stability issues may be caused by file access rather than autofocus.
These are old problems, which are still present in the latest ROM/gapps.
No problems with the navigator, Firefox, exchange email, calendar, etc.