Below is the patch submitted to fix the 1.5 mopd bug.  If
you have source, this will be very trivial to apply.  The
reference to the original send-pr bug report is:

"bin/11253: seg-fault in mopd on Oct 12/i386/1.5_ALPHA2"

*** process.c   Sun Oct  1 06:54:09 2000
 --- nprocess.c  Fri Nov 17 23:01:38 2000
 ***************
 *** 357,362 ****
 --- 357,364 ---- 
         if (slot == -1)
                 return;
  
 +       dle = &dllist[slot];
 +
         if ((new_count == ((dle->count+1) % 256))) {
                 dle->loadaddr = dllist[slot].nloadaddr;
                 dle->count    = new_count;