php4 segfaulting

Hello, I have a strange problem with PHP4.0.0 release - on some (6 at the moment) IMAP-account a logon-attemp to IMP causes Apache to die with: [Mon Jun 5 20:09:45 2000] [notice] child pid 18606 exit signal Segmentation fault (11) This is reproduceable on all the accounts it affects but other accounts work just fine and even the "faulty" ones do work fine with stand-alone IMAP or POP-clients and there's nothing special with the mailboxes. My configure-line is: ./configure --disable-debug --with-mysql=/usr --with-pgsql=/usr --with-imap= /usr/local --with-gd=/usr --with-freetype --with-apxs=/usr/bin/apxs I'm using ZendOptimizer, Apache is 1.3.12+apache_ssl 1.39 on RedHat Linux 6.1 c-client is v. 4.7c2 (also tried with 4.7b - same problems) - IMAP-server is on different machine on the same network (UW-IMAP 4.7) I've also tried using PHP without the ZendOptimizer - no luck. -Kari