I think the real bug is you can't delete the trial group once created.
Somewhere that came up and it would either be in version 7.6 or plus somewhere. But you may be able to just uncheck the allow trial period.
I know I do have one test group in 7.5.6 ad I can't delete it.

Well I looked at this some more
If you delete the members of that group it will allow you to delete the group But need to re-assign them to at least one group such as users

Also I noticed by deleting the group I get a "your subscription has expired notice" on a PM

Last edited by Ruben; 10/24/2012 5:09 PM. Reason: Added 2 comments

Blue Man Group
There is no such thing as stupid questions. Just stupid answers