Eureka! the problem was in wrongly mounted /var and /usr partitions. was not so easy to find :-(
Thanx for your help! -- You're not my type. For that matter, you're not even my species!!! -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20120316124820.gb24...@theo.chemie.tu-muenchen.de