If one edits group's details and changes it names and then goes back to Groups Summary page, then this group disappears from the view (it doesn't disappear in real, just doesn't show up in the list). One can create or delete another group to make this edited group to show up again.
Removing the 'fix version' for all unresolved issues that were scheduled for version 7.8.2. We're releasing this version today - the remaining issues should be rescheduled later.
Peter Johnson graciously submitted a patch. It is now attached to this issue.
Applied the patch from Peter, which at first glance appears to fix the issue. Wroot, can you confirm that the issue is now gone?
Actually, this works fine with a few days old 3.8.1 nightly build, so maybe your previous MUC cache fix cleared this one too. So, probably no need for this patch.
Thanks for the feedback wroot. I think I'll leave Peter's changes in - they seem sensible, by resetting some (other) caches that might contain a reference to the old group (instead of the new one).