The texture of the furnace and the dispenser are not correct, probably because of the re-arrangement of the texture-system.
EDIT: Also the dispenser uses the furnace texture, when placed. (And redstone has weird braking particles.)
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Also placed dispensers look like furnaces
Maybe change it to a general issue about wrong textures to avoid having too many issue reports about them as they just implemented the new texture system
also when you break redstone dust the particles look like black text on a red background
right bottom the furnace has no face
yes my dispenser looked like a furnace i was like what
Also, repeaters and comperator particles are done wrongly. I think the particles don't have invisible parts, and the (normally invisible) parts are now painted black
well your status is confirmed
We should rename this texture issues, also ghasts fire burning diamond helmets at you instead of fire charges
Confirmed by Dinnerbone. "Nathan Adams @Dinnerbone
Whilst the Dispenser may look like a furnace, it is just going through some identity issues and will return to normal shortly."

Would seem to not be properly fixed (see MC-7097).
the redstone dust particles are actually the same as the redstone BLOCK particles probably because of a new texture (like gravel) and their made of the same thing.
Not enough proof provided in MC-7097 that issue still persist in 13w02b.
NOT SO MANY BUGS IN ONE POST!! It's easier for the Mod's to Manage if one in each post!