jsds_NotifyPendingDeadScripts [mozilla/js/jsd/jsd_xpc.cpp, line 501]

In FF 2.0.0.1 I am occasionally crashing with
jsds_NotifyPendingDeadScripts  [mozilla/js/jsd/jsd_xpc.cpp, line 501]
eg talkback Incident ID: 29022911.
The code above 501 is

492            /* get next deleted script */
493            gDeadScripts = NS_REINTERPRET_CAST(DeadScript *,
494                  PR_NEXT_LINK(&ds->links));
  495      if (gDeadScripts == ds) {
  496                  /* last script in the list */
  497                     gDeadScripts = nsnull;
  498         }
  499
  500        /* take ourselves out of the circular list */
  501                         PR_REMOVE_LINK(&ds->links);
so it would seem that then ds list has bad entry. Anyway I
could cause that through jsd interface?

Thanks,
John.