Yes, both /list and /delist are completely broken. Every single command in the game was rewritten for 5.2 (some more trivially than others), and it appears we missed checking those two.

Shaker: Unfortunately It's hard to impossible to say what might have caused that without more information. Do you have any scripts running? Particularly those that might edit jjPLAYER::spriteMode, jjPLAYER::spriteParam, jjPLAYER::lightType, jjPLAYER::light, or jjPLAYER::antiGrav?