This time it’s not so controversial. For the past few weeks a denial of service attack has been exploiting a ‘loop hole’ that forces Ethereum clients to do more processing work than the gas ‘fee’ pays for.

Ethereum developers are now planning a swift hard fork to overcome the exploit. It has also been suggested that they will be considering the possibility of combining such a fork with the introduction of Metropolis (AKA “release step 3”).

Full article can be read here.
Reddit discussion.