Google was giving the same warning. I only have this response from our webmaster:
And Google is now no longer barring us.

Yesterday I got a Firefox alert on Abandonia, that it contains risks. I did not enter. Today it works, but now it doesn't accept the quiz answer.

I just got answer right. Maybe you was not logined?

When this kind of errors appear it's a good idea to refresh your browser afterwards :-(

Thanks for the replies, all seem to be good indeed.

Front page won't let me log in again...

Same here. I get a "signed in" confirmation with my profile stats, but I am still listed as not logged in (am able to log in to the forums). Thanks to those working on the problem!