We may need to be looking at this problem, coins with KGW are being attacked!...
Regarding Auroracoin TW exploit (Fix included)  https://bitcointalk.org/index.php?topic=552895.0
"The exploit BCX has found in KGW implememtation is real and, I believe, he is most likely attacking with the exploit just now..."

Pandacoin was hit with an attempted attack last night..