I went though this pain with 10.2, and went around the loop again with 10.3. In the end the rt2500 fix didn't do it for me. I've now gone back to the original supplied rt2500pci drivers, BUT, using "NetworkManager" (global options in the Network Device Dialogs) - working a treat now.

Suspect that SUSE guys have been concentrating on this interface and that the old ifup/down system is falling by the wayside????

Paul