Retail, with 4.4.6. Got this mousing over one of my artifacts:

5x FrameXML/CollectionsUtil.lua:71: bad argument #1 to 'sort' (table expected, got nil)
[string "=[C]"]: in function sort' [string "@FrameXML/CollectionsUtil.lua"]:71: in function <FrameXML/CollectionsUtil.lua:42> [string "=(tail call)"]: ? [string "@BetterWardrobe/Modules/Wardrobe.lua"]:2889: in function RefreshAppearanceTooltip'
[string "@BetterWardrobe/Modules/Wardrobe.lua"]:1342: in function <BetterWardrobe/Modules/Wardrobe.lua:1339>

Locals:
(*temporary) = nil
(*temporary) = defined @FrameXML/CollectionsUtil.lua:43
(*temporary) = "table expected, got nil"

Also, sorting options aren't doing anything. Artifacts are randomly sorted no matter what sort type I pick and it never changes.