SOAP method addGroup gives error when creating uppercase group names in 2.8, but didn't in 2.5.6

We have confluence 2.5.6 running and it allows case sensitive Adding, Editing, Viewing of Groups, either via SOAP and Web-UI.

Now i am running my SOAP-Management on a 2.8.1 and saw that it only allows lowercase anymore, but still the items in the database are case-sensitive. Of course you can recommend now, that i lowercase my existing groups, but that isnt the point.

I can remember when i got an officially statement that case sensitive should be there because of integration with other user frameworks. So i wonder why it has been changed to lower completely. Hope you can fix this in the 2.8.* releases.

I am not really sure that will be done, please give me a good reason why case sensitivity has been turned off, as i am willing to switch to a 2.8+ release in the next future, but this gives me a big headache... (things on upgrading you not think of )