I wonder if it has anything to do with number of usergroups? I've tried just about every combination of moving styles and usergroup selection. Moved a user into just one usergroup, moved style to root level, child level, etc. No change.
Any ideas?

Hmm, if your allowed usergroups string exceeds 250 characters - that would indeed be a problem.

Not hitting that. The database if filling with the correct usergroup ids (comma delimited). It is pulling out correctly for populating the check boxes. Hmmm.

Something must be different then. I believe that I have it set up identically to yours... but it's still not working. Mine looks like this...

(x) = User Selection Turned Off & Zero Usergroups Assigned
(o) = User Selection Turned On & One Usergroup Assigned

> Default (o) <-- Default Style Upon Registering
>> Style A (x)
>>> Style A1 (o)
>> Style B (x)
>>> Style B1 (o)
>> Style Z (x)

Not sure if a setup like this would work ... how should A1 and B1 be displayed in the chooser if the parent styles are not selectable?
*testing*

I set it up like this... and it's still not working.

> Style A (All, Default)
>> Style A1 (UserA)
>> Style B (UserB)
>>> Style B1 (UserB, UserB1)
>> Style C (UserC)
>>> Style C1 (UserC, UserC1)

I've tried it with and without setting User Selection. I think I've tried everything. I'm lost. Lost and helpless. :ermm:

After being able to reproduce the problem on another Board:
ZIP updated

It works! Thank you so much for your patience.

Great work, thank you so much.

thanks lots!!
/me installs