[anewhnaccount2]

There is a vertical scroll bar. You need to check them all because they're all checks.

[dpwm]

In case anybody missed the humor in this, like I did the first time round: all of the pictures denote some kind of "check". Like with the bows.

There are pictures of people checking things – a watch, and something else I can't quite see.

There are games of chess in a state of check.

There are monetary checks.

There are check boxes.

[SamWhited]

I scrolled down and still couldn't see the checkboxes under the last row. Maybe it also doesn't work on Firefox, because as trivial as it is to make a site that works everywhere no one does. Normally this frustrates me, but if that's the case here it kind of makes sense.

[jcranmer]

The checkboxes are actually above all of the images.

I tried scrolling down, realized I couldn't, then scrolled up to find the unfilled row at the top...

[eric_h]

I did exactly that as well. I’m also happy that there appear to be several different captchas, as others mentioned ones I didn’t see. The best one I clicked through was “select every picture with glasses” and every picture had either eyeglasses, drinking glasses or panes of glass.

[PebblesRox]

I’m pretty sure the top row of check boxes doesn’t appear until you scroll back up.

[SamWhited]

facepalm this is even better.

[lisavanh]

LOL LEGEND