Annoying page stretching

I'm using Firefox, and the nextgen theme, and every once and a while the "Who's online now" display's itself all in one line thus stretching the page a lot, is anyone else having this problem?
Pic:


As you can see, you can't see the most recent post in the section unless you scroll all the way over.

 

I have it every now and then, and it's extremely annoying.

I use Google Chrome, and my fix was just to simply restart the browser.

 

I have this sometimes and it's mainly when using my Iphone (With Safari of course).
(Oh the irony look below)
At the moment your post is all stretched but everything else is normal sized.

 

I believe its the theme just change it to classic or something else you would rather like.

 

happens to me aswell. i hate it

 

I get this too on the 'Classic' theme on chrome, only on index, no biggie.

 

weird