I'd suggest doing something similar to what they did in that thread
I've started up the game with default only, then tried the skis and they work. I've been adding back my add-on list slowly, testing the skis as I go: and now they work even with all the same add-ons enabled as before.
I don't know how to explain this at all.
and also posting my generic advice which I should really save in a text file for copying and pasting
does the issue occur with all addons except skis disabled?
if it does, what if you do a clean install without keeping addons?
