Fetish Classic is da bomb, and that's why Fetish has a lead
About the zoning crashes: I experienced one. Fetish Classic 3.4, with the LU 7 pet change. I was in Serpent Sewers with Map, Bags open - possibly Inventory open, I don't remember. Used CotO to get back home to Temple Street, and crashed upon zoning.
Haven't been able to reproduce yet, and haven't had any other zoning crashes. I'll keep an eye out. If I see a pattern emerge, I'll let you know.