Interim result: I checked out some distributions on different hardware: SuSE 9.3, SuSE 10.0, SuSE 10.1, Knoppix 4.0.2 There were no problems with the authentification popup except the SUSE LINUX 10.0 (X86-64) Version. I didn´t go into detail, checking the source code, so the final error remains unsolved. Greetings, hh