Can't run tdesu any more (openSuSE)

Hello all, I just followed my systems proposal (on openSUSE) to update lots of things and there has been a change that I don't really master. Before the update, I could start programs that need root rights (such as Yast) with: tdesu <program>, and enter the password. After the upgrade, it no more works (the password window stays there and does not accept the password). Calling it from the command line brings: Daemon not safe (no sgid), not using it A search suggested (for KDE's kdesu) chmod G+S but this brings: The TDE binaries are not designed to be run with suid priviledges So: a) is this something new with newer kernels - so the problem will come to Debian soon? b) is there a solution