It's probably related to GPU drivers. What card are you using? I have GTX650.

troy has gayforce too. Do you have, Joku?

Quote from pmw :

It's probably related to GPU drivers. What card are you using? I have GTX650.

troy has gayforce too. Do you have, Joku?

I have ATI Radeon HD 5770 iirc

EDIT: Tested also on laptop. No freeze.

Maybe its not LFS but another app that hooks in when the clipboard data has changed. I.e. shared clipboard over network when using RDP or other fancy tools. Just a rough guess.
On the other hand, don't press the button

No it's not anything like that. Atleast on my case. Yeah I don't normally even press it, I jus tried to check my car's pit settings, and I've binded F12 into my steering wheel. But for some reason, I just wanted to press F12 and made a mistake.