If you click on a speech bubble the yellow pop up box shows up with the posters contents. If that person has posted a large picture bigger than the box vertical and horizontal scroll bars appear.

The problem

If you click on the bottom horizontal scroll bar (to scroll left to right) the yellow pop up box disappears.

You actually need to click pixel precisely on the very top of the scroll bar for the yellow box not to disappear which can be very annoying.

I have tried this in the latest Google Chrome and IE.

Can somebody else confirm this?