by ublug Sun Apr 28, 2013 2:00 pm
We suspect it has something to do with vagrants, or drift items, since items will only change if you are playing online.
I can make these by dropping items and run so far away from the drop point that killed enemies in the area will respawn, then run back (no warping or quitting) and sometimes the item will be replaced with something else, I usually find lloyd's talismans (and I usually drop consumable items). It doesn't work every time either, maybe 1 out of 5 or something.
Retro found that one of the shortest routes for making items change is by dropping them in Darkroot Garden, right outside the titanite demon room, then run to Firelink and back again.