I wanted a cheap commuter bike, and just received this bike from Amazon. I have little knowledge about bikes, but looks like the middle chain-ring is broken to me.
Is this indeed broken, or is it something that is not too big and can be safely ignored? (I am still to get my tools so haven't yet assembled the bike, so can't say if it shifts/rides alright in that ring.)
If it is not something to worry about for now, how long do will it last till major problems start showing?
(Larger version of the picture here.)