On video pages, can't see the comments

Since maybe Tuesday I've had this issue: On a video page, scrolling down the page keeps the video in view but leaves a tiny portion of the screen at the bottom where I can see all the comments (the page does scroll within this small section). I'm using Chrome, and this issue doesn't seem to come up with IE.

It was fine a few days ago, so I'm not sure what the deal is.

Thanks in advance for any help.

...And I'm an idiot. Didn't realise I had the video stickied, not a feature I've consciously used before.

Sorry!