Can anyone else reproduce this bug? ;`[a,b] in `[anythings, a, a] => Some very large number (or a driver crash) For example: ;`[1,2] in [7,8,9,1,1] I believe I encountered this same bug in bufidx() a few driver versions ago (which was fixed), and didn't realize it impacted the 'in' operator as well... - Kipp