Hi all, A heads-up for anyone using Red Hat. I just upgraded my desktop to Red Hat 9, which includes a backport of the Native POSIX Thread Library (NPTL) from 2.5. Unfortunately this appears to break (my) Zope (application). The symptom is a seemingly random blocking on a FUTEX_WAIT. I don't have time right now to find the cause; a workaround is to set LD_ASSUME_KERNEL=2.2.5 in the environment. http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/release-notes/x86/ seb