So why can you no longer right click on the window with GL open? I've got a lot of commands bound to the right click menu, and it's annoying to need to switch between windows to do something that I should be able to do within two clicks. This has nothing to do with copy+pasting.

I run on firefox and I can use right click as long as its not within the frame that GL is showing.

GL and my browser are often on my second, smaller screen. Because of the second screens size, GL takes up the entire window, and I switch control between screens from a right-click menu.
Even if I had it on my main screen, what's the point of blocking right clicks within the GL window?

That's the issue being pointed out - which has before. Dan put a script in GL to disable right click. As far as I know, nobody knows why. Preventing access to debugging & etc. isn't a reason.. You can still F12 in chrome and mouse over the desired element to get to it with ease.

Right, and you can use the same process to get access to the direct image links, if 'image pirating' was a motivator.. Even getting access to debugging.. it's not like there were any exploits/hacks that you could get to work that way. As far as I am aware, anyway.