*bump* Good day, gentlemen. I have had the same issue on my Windows 7 laptop PC. Asus G73 running ARMA: Combined Ops. As hatch stated before me, its an issue fixed when you hold ALT and then aggrevated again when you move with the WASD corner. What causes it, precisely, is unclear to me. Anyway, to fix it, I minimized ARMA. I went into the Windows Accessability Options inthe Control Panel and turned Sticky Keys & Filter Keys [OFF] as well as any Quick Shortcuts [OFF]... I don't know if this is what caused the issue, but I turned them off to be sure. Next, I toggled back into ARMA and went into the ESC menu to the control options. I then hit [DEFAULT] (this destroys your custom button-mashing setup, btw), back in the game WASD & the game perform normally. EDIT: Sorry, I shouldn't have posted this solution; it does not fix the problem. I'm going to uninstall Chinese Language support and hopefully that fixes it.
