Can not update user data after 3.6.11.10245 update

[lostmail]

I just updated to com_virtuemart.3.6.11.10245 and now I can not update customer data:
Fehler

vmError: Set shoppergroup error
vmError: Konnte die VirtueMart Benutzerdaten nicht speichern

When I try to open and save an existing customer the error comes up.

Perhaps it is while there are 2 default shopper groups ?

UPDATE:
All customer accounts have no shopper group - I added the group "default" to a test account and now it saves the data.
There seems to be a problem when cutomer accounts are not assigned to a special shopper group..

What now ? Do I have to open each single customer and add the "default" group ?
Or is it a bug ?

UPDATE:
It seems the error is only when I´m logged in as admin and try to change an existing customer !
When a customer is logged in he can change and save.

[Milbo]

I think that is fixed, please try http://dev.virtuemart.net/attachments/1250/com_virtuemart.3.6.11.10302_package_or_extract.zip