ad pops up and blocks the captcha?

adblock solves that.

Alternatively, you can read the javascript code on that page, and figure out which cookie you need to edit and change the expiry date to 20 years from now (instead of 24 hours), which would prevent the popup from ever appearing again. :P

also doesn't happen with firefox. thanks.

lol@xin

i got that popup when adblock blocked captcha but after he fixed his site captcha came even adblock on.