In the Popular Threads Right Now section, if a thread's title is over a certain length (seems like most are) you have to click it to see it in its entirety. For instance, in the screenshot below only How to show HTML code on a we... is shown for the first thread when the whole title is actually How to show HTML code on a web page? What I usually do (in Chrome) is right-click a title and then click Open link in a new tab, so as not to navigate away from the main forum page. However, I think it would be best if a tooltip displaying the full title of each thread were to pop up as its link is hovered over, so that users won't have to click it to find out what the thread was actually about.
I agree that would be an excellent addition! As a side note, something that I figured out is by clicking the link using the scrolling wheel in the middle of my mouse, it automatically opens up in a new tab. That may work for you as well