possibly somone mess with damage values, try recipe with iron furnace.
Or try a full battery, maybe there is the error.
Iron Furnace recipe its working but not the other one.
Tried with a charged/uncharged/partially charged RE-Battery and nothing.
My cobble furnaces also seem to refuse to smelt IC2 items -- I couldn't smelt ref. iron, tin, copper etc. in a cobble furnace, but using iron furnaces works perfectly. Perhaps these two bugs (cobble furnace cannot be crafted in an IC2 recipe and cannot smelt an IC2 recipe) are related? (I also can't craft torches and sticky pistons using resin like the wiki says I should be able to, but I'm not sure how important a bug that is).
My cobble furnaces also seem to refuse to smelt IC2 items -- I couldn't smelt ref. iron, tin, copper etc. in a cobble furnace, but using iron furnaces works perfectly. Perhaps these two bugs (cobble furnace cannot be crafted in an IC2 recipe and cannot smelt an IC2 recipe) are related? (I also can't craft torches and sticky pistons using resin like the wiki says I should be able to, but I'm not sure how important a bug that is).
Those recipes where changed from resin to rubber
new ores are single block with meta now, normal furnace cant smelt them, not a bug.
new ores are single block with meta now, normal furnace cant smelt them, not a bug.
Actually... I can smelt them fine in a normal furnace. 
My cobble furnaces also seem to refuse to smelt IC2 items -- I couldn't smelt ref. iron, tin, copper etc. in a cobble furnace, but using iron furnaces works perfectly. Perhaps these two bugs (cobble furnace cannot be crafted in an IC2 recipe and cannot smelt an IC2 recipe) are related? (I also can't craft torches and sticky pistons using resin like the wiki says I should be able to, but I'm not sure how important a bug that is)
Do you have Level up mod? It seems to be breaking the furnaces and somnia mod
I cannot make torches using sticky resin. Also, the other secret use of sticky resin seems to have been replaced by rubber, which makes no sense considering the sticky nature of the secret recipe.
The incorrect secret recipe is already fixed
@FenxR -- Huh, the changelog on the wiki doesn't mention rubber replacing resin in any crafting recipes, but I just tested it out in minecraft and it works. (I added a note to the wiki just now). Do you know why the change was made?
RawCode -- If I'm interpreting TMI's interface right, all of the IC2 ores have their own block ID's - they are listed as blocks 247-249, while, say, the various wool colors are listed as block 35:1 or 35:13, but I can't be 100% sure on this
IC2 dev team -- feel free to correct me if I'm wrong.
kamil960 -- I don't have any mods (edit: besides IC2 
) (TMI was installed after I discovered the bug), but I did attempt to install NEI a while ago and had to abort that. I thought I hadn't backed up my .jar properly; the fact that FenixR is experiencing a similar bug makes me wonder if the problem is a bug in IC2/MCForge.
@Rubber recipes: Should be fixed in next release, somebody messed up the recipes whilst porting to our new item system.
