I think I've been able to reliably recreate this bug. Issue: When a unique Pet Equip is equipped to a pet that should not be able to equip that item, the game (eventually) will crash to desktop without an error. How I recreated this bug: I have a pet Fluffram summoned with the pet equip Fluffram Ribbon equipped (the equip is unique to Fluffram). I un-summon the Fluffram, then summon another not Fluffram pet; in this case a Mage Sheep. The Fluffram Bell is still equipped (however, it isn't visible on the new pet, nor do I gain the stats from it). I cycle through hair and face styles through Big Headward, eventually the game crashes; typically in under a minute. I also have crashed when talking to other NPCs, or when other dialogue boxes open, or even just sending chats. Other variables I haven't tested: I haven't tested a clean pet equip. My pet equip is scrolled with speed and jump.