I've tried this in both Chrome and Firefox browsers. Right click doesn't work for any link in the main site, though it works in the forums. Since I'm currently using a mouse without a scroll wheel to middle click with, this makes it very difficult to open new tabs here.

Right click is intentionally disabled on the main site.

Of course you can open new tabs with ctrl+T, but I assume you mean duplicating the current tab. To do this you can ctrl+left click the reload button in the tool bar (in Firefox. Maybe this works in Chrome too). In IE, ctrl+K duplicates the current tab.

I hadn't been aware of those shortcuts. Ctrl + left-clicking on the link does exactly what I wanted. Thank you.

If you're using a tablet (or you don't have a keyboard) and would rather that everything be possible by clicking, then you can disable the disable by turning off javascript temporarily. Some browsers (at least Opera) also include a feature to specifically counter right-click disabling. The main site doesn't really use javascript all that much. If right-click disabling is really important to you guys for some reason and you censor me, I understand. Well, sort of, anyway.

Here's a link, for your reading pleasure

In particular:
"it has generally fallen out of favor due to being a combination of ineffective and annoying."
It won't stop anyone, and only irritates normal users. Okay, I'll be going now.