I think the Spider Amulet should do something, poison resistance should be logical or the amazing ability to scale walls. <img src="/ubbthreads/images/graemlins/eek.gif" alt="" />
It's probably one of the many item-related bugs. See other posts about unique and set items...many of them have NO EXTRA STATS whatsoever!!! <img src="/ubbthreads/images/graemlins/cry.gif" alt="" />