Find on Page Feature Broken

I upgraded to PortableFirefox 3.5.2 and everything was great until my "Find on Page" (CTRL + F) feature stopped working. This was several days after the upgrade. I press CTRL + F and the bar shows up at the bottom, but when I type my search term into it, all the buttons stay "greyed out" (unselectable).

Anybody have any ideas?

Thank you!
Billy