the following message appears after I enter the root password.

/usr/lib/YaST2/bin/y2controlcenter: symbol lookup error: /usr/lib/YaST2/bin/y2controlcenter: undefined symbol: _ZN9QListData11detach_growEPii
It doesn't launch from the root console, either. But, the text-based YaST works fine. I assume that something went wrong after my last system update. Could someone please tell me which package I need to downgrade, to get things working, again?

Thanks, in advance!