Here is a case: http://stackoverflow.com/a/4760279/300011
This answer was edited by a user and the example given in the answer stopped working (he/she didn't even test it). It somehow got approved too (No idea how). What to do? (I already rolled back but is there anything else that needs to be done?)
The other thing is why wasn't there a notification for me that my answer was edited? Is this normal or must I have missed it? (Saw by chance).