Extra metal and metal bug.

There is an extra metal ore on the ice planet.

There is a bug where when you move fabbers away from a metal extractor the mex gets bugged and will not build once the atrophy kills it.

Probably just lost a game because of this

Another bug regarding mex is that when multiple players are reclaiming a Mex wreckage and than instantly start building Mex they both build it on top of eachother. Also you cannot build T2 mex ontop of it then. (It's an old bug though but still relevent).