I heard somewhere that they weren't working probly... If so how long haven't they been working for?

They're already working again, at least for me they are.

They've been fixed now.

I am pretty sure it works now :)

I dunno. I have heard they are working again, but I haven't recieved a lizard random event since they released the achievements.

I've recieved 1 since the achievement came out, so yes they are definitely working.

Oh. it must be my bad luck -_- I've just not gotten any events since.