Hi all It seems that Problems with Solaris threading should be solved after installing Python 2.1.2 or Python 2.2. The thread to read up on this can be found at: http://groups.google.de/groups?hl=de&threadm=slrn9phonu.vq6.bbrox%40bbland.b brox.com&rnum=2&prev=/groups%3Fq%3Dsolaris%2Bthreading%2Bpython%26hl%3Dde%26 selm%3Dslrn9phonu.vq6.bbrox%2540bbland.bbrox.com%26rnum%3D2 The corresponding Python patchnumber is #460269. I'll try this on my Sun Solaris 2.8 and on my Intel Solaris 2.7 next week (my administrator's on holliday - !!!Grrrrrr!!! ;-) I'll post my results. Thanx to all who have helped solve the problem and burned a few calories thinking about the solutions! If anybody has more questions or can confirm the successful use of Python 2.1.2 (see problems in thread "threading, dtml and performance"), then please respond to the list. Oliver Erlewein