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I was just playing Medal of Honor. Every time I ran the framerate and my movement would become jerky. I use right shift to run (I'm left handed so use the right side of the keyboard for movement). I tried just holding the shift key and not moving - looking at the moving scenery (in this case trees waving in the wind) I could see the jerkiness.

I re-assigned the run key to a different key (delete) and this didn't cause jerking, but shift still did. I'd prefer to use shift for running so I need to fix this. Anyone else experienced this?

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Maybe your keyboard has hardware limitations? Does it happen to be wireless? Is it USB or older connector? –  WillfulWizard Nov 6 '10 at 5:12
    
USB. It's a logitech wave. I think it's ok now. –  MrVimes Nov 6 '10 at 16:43
    
it came back. 2 –  MrVimes Nov 6 '10 at 23:58
    
so... I guess now that this post is a few days old it will be forgotten. –  MrVimes Nov 7 '10 at 23:16
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Pressing left-shift 5 times in a row triggers accessibility options, which might interfere with the game's performance. Can you confirm that? –  DrFish Mar 2 '11 at 19:52

2 Answers 2

Did you ever figure out the problem? If not, have you tried updating your keyboard drivers from Logitech? I'd start there. I'd also check to see if any other programs running in the background have right-shift bound.

If that doesn't work, have you tried swapping out keyboards? That should give you an idea if it's your computer/software or the hardware.

Good luck.

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Yes, this used to happen to me. When you use Shift it can come up as a sticky key. In the background of your computer while you play medal of honor it comes up as laggy. This happened to me but you may have a differnt problem. I hope i have helped you.

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