Hi that's my first mail to that list - so plz be patient with me ;). Sould the following be already known - sorry too.
After upgrading to libc6 2.2.3-1 (testing and unstable) I realized that locking via nfs cheased to work. A little digging around revealed that rpc.statd exited due to some symbol missing from libc6. Recompiling nfs-common solved the problem. Dietz