And today's borked object IS.... (cue fanfare)
The tree house door (master mesh)!
Thanks to JRon who gave me a prodding with the pointy end of one of the branches, it seems that, as usual, I had managed to add a nice blue texture to the game icons of all the doors and windows that take their colours from this master file.
I have now got rid of the blue texture. Simply redownload the door from here...

FIXED: Tree House Master Door
You might need to refresh the icons for the tree doors and windows in your game catalog. If so, hold down the Ctrl key on your keyboard, and click the right mouse button on each icon - including the recolour choices).


