Same here. I can't post ANY answers in the comment section of articles, or I'll have the same message. I have this problem since I signed in (like 3 weeks ago). It's getting really annoying :/

(I can post messages. Just no "answers")

Of course I deactivated both Adblock and Ghostery, so nothing seems to interfere... I tried with Firefox but funny thing : I can't even log in ! Gosh I'm starting to wonder if Gamespot has been tested at all...