[TYPO3] realurl not working when logged into BE

[media.res | alex widschwendter]

for the archive:
> has somebody experienced the same problem as described in the subject?
> if im not logged in the BE, realurl is working as expected, but as soon 
> as i log in, the world famous error "Reason: Segment "bla bla" was not a 
> keyword for a postVarSet as expected!"
> 
> any solutions or experiences out there?

the described problem is the case if its a multidomain setup with no 
rootpage_id set in realurl configuration.

cheers a