Thank you. This clarifies everything. Now I am waiting for that SR6 before updating any production servers.
Ha! Found it: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=102683
glibc function was pthread_getattr_np. Claim is made that there's a fix in SR6 of IBM's JVM. I don't see SR6 on their web site yet, though. Latest is still SR5.
I'll be waiting for SR6 myself. IBM's JVM 1.3.1 is the *only* JVM that runs Sun's iPlanet Console 5.1 on Linux properly.
-- Jouni Rajala