I have a large single floor mine, and I can't for the life of me find any iron (or anything but rubble, for that matter). What gives?
And why does every second wall I mine become black and cannot be mined unless I light a fire and let it burn for 2+ hours? Someone said it could be mined without having to light a fire, but my character just walks up to the black wall and does nothing.
Where does (pig) iron come form, after the patch? Are there veins in single-floor mines, or do I have to expand my mine until I find the second level in order to have a chance to find iron?
Is it just me, or is iron much more difficult to come by after the patch?