keyboard shortcuts not working on one website

I was on a Macbook Pro 15" Snow Leopard, and having a problem where no matter what browser I used, I was unable to use keyboard shortcuts on Alternet.org. The problem happened with Safari, Chrome, and Firefox.

Just upgraded to the MBP 15" with Retina (basic build, no upgrades, Mavericks, Software OS X 10.9 (13A3017)), used a Time Machine backup to set up my new machine, and am having the exact same issue.

I can still select and copy manually (menu shortcut or right clicking). No other users I've asked are having this issue on Alternet, so it's not a website problem, and my keyboard shortcuts work fine for every other website.

Any idea how this happened or what I can do to remedy it?

 

beuller...

Note that I've searched many hours for a possible solution, so this isn't laziness on my part.

Shameless bump.