Basically a friend of mine (Phoenix Dracul) came across this problem. Since the fellow data is now freed up properly there are a few new problems because of the way the old introduction system handled a few of its pointers. What's happening is that it sets fellow->victim like so:

fellow->vicitm = victim->name;

This makes fellow->victim point to the same piece of memory as victim->name and if the character that has remembered the name logs out it frees that space up, corrupting the player names. Neeless to say, this is a critical bug that can cause a lot of problems.

The fix:
in: act_info.c, function: do_remember find--

   CREATE( nfellow, FELLOW_DATA, 1 );
   nfellow->victim = victim->name;
   nfellow->knownas = STRALLOC( argument );
   LINK( nfellow, ch->first_fellow, ch->last_fellow, next, prev );

and change to:

   CREATE( nfellow, FELLOW_DATA, 1 );
   nfellow->victim = STRALLOC(victim->name);
   nfellow->knownas = STRALLOC( argument );
   LINK( nfellow, ch->first_fellow, ch->last_fellow, next, prev );

in do_describe find:

         CREATE( nfellow, FELLOW_DATA, 1 );
         nfellow->victim = fellow->victim;
         nfellow->knownas = fellow->knownas;
         LINK( nfellow, victim->first_fellow, victim->last_fellow, next, prev );

and change to:

         CREATE( nfellow, FELLOW_DATA, 1 );
         nfellow->victim = STRALLOC(fellow->victim);
         nfellow->knownas = STRALLOC( fellow->knownas );
         LINK( nfellow, victim->first_fellow, victim->last_fellow, next, prev );

in do_introduce find:

   CREATE( fellow, FELLOW_DATA, 1 );
   fellow->victim = ch->name;
   fellow->knownas = STRALLOC( argument );
   LINK( fellow, victim->first_fellow, victim->last_fellow, next, prev );

and change to:

   CREATE( fellow, FELLOW_DATA, 1 );
   fellow->victim = STRALLOC(ch->name);
   fellow->knownas = STRALLOC( argument );
   LINK( fellow, victim->first_fellow, victim->last_fellow, next, prev );

This way each character has thier own memory allocated pointers, which are properly freed when the character quits.

Happy Coding,
KeB