Meant to post this during the weekend.
Sometimes, right after a travel, the arrow keys would not start movement. I'd have to click with the mouse. This happened if the signpost was blue when I landed in the new location.
Using Firefox Beta 4, iMac, OSX 10.5.8
Meant to try the regular firefox and Safari, but had Easter stuff come up and didn't get to it. Probably a FF-beta-4 problem. Just thought I'd mention it. I plan to try it again during the next beta test. :)