It seems the nomber of coal ores you can put in the furnace has been reduced. I even tried adding them one at a time but still got the message saying that I should remove ores before adding more.

 

 

 

I will try and get an accurate number tonight - unless some other player manages to do it before me. :D

I think it was half of regular needed coal? 1 for steel, 2 for mith, 3 for addy, 4 for runite.

No i was talking about the maximum number of coal ores you can put in.

 

 

 

It used to be you could deposit 224 lumps of coal - that works out as 2 full inventories of rune. The maximum now is 214.

 

 

 

It still seems to use the same number of coal per ore that requires it (though I do not have the smithing lvl to be able to check rune).