Do you use CIFS? The latest abend dated 9/10 is with CIFS. CIFS is used to access a Novell server without using a Novell Client.
I see you're at 6.5 SP5 - Have you applied the Post-SP5 CIFS fixes? If not you might just consider updating to a newer SP. SP7 is available. For info and potential issues, please check this page:
http://wiki.novell.com/index.php/Nw65sp7