How can I find what is interfeering with CTRL+F?

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http://unix.stackexchange.com – I'm running LinuxMint12 with Gnome with Cario-Dock and I have a logitech G15 keyboard. I setup a bash script with the extra keys to take the active window, resize it and move it to a specific location on one of my screens. But after a few days of usage when I restarted my computer the CTRL+F shortcut stopped working in applications like FireFox, chrome, or any other program I try. A lot of things changed between restarts so I'm not even sure where to start looking. At first it was launching the folder stack from Cairo-Dock so I disabled that shortcut. Now it does nothing. I've gone through th (HowTos)