On Wednesday 21 February 2007 14:23, Michael Guntsche wrote: It locked for me after I created 70 threads. Linux version 2.6.18-3-686 (Debian 2.6.18-7) (waldi at debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-20)) #1 SMP Mon Dec 4 16:41:14 UTC 2006 qt-4.2.2 some sip snapshot from a few months ago Matt