no need to do that. the marble still work fine, they have marble in them, if you hover over it shows how much marble, the graphics are just wrong. And the iron mines just require you to refresh or change zone and you can build on them.
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I haven't seen any problems with this since the last update.
Had bugged marble mines a couple days ago again...
I had this bug with a coal deposit found with "2in1" skill. The deposit text said [3000 coal in group:26] and no skill popup. After refresh the mine could be built on it and the skill popup showed "Tendentious geologist" and "Two Coal in One" skills.
Not sure its connected but I had a mouse over glitch yesterday, I moused over one marble deposit freshly found and the deposit quantity appeared on the neighbouring deposit...gave me a chuckle.
This problem seems to be back.
http://www.safeunderdark.com/img/TSO/TSO-166.jpghttp://www.safeunderdark.com/img/TSO/TSO-167.jpg
found with the conscientious geologist. The graphics stay the same after a refresh too.