Right. And drinking 130l of fresh, sparkling, cool water from a pristine source, all at once wouldn't kill me?

Same problem here. FPS will drop from average 40-60 down to 2. Yes, that 2 FPS. Location is immaterial - it could be indoors, in an urban area, open fields. deep woods.

The problem doesn't affect other players in my vicinity, nor zeds, who seems to aggro on the jittering guy and will pass other player to attack me.

Mine was labelled "Confirmation of Changes". Seen on the outskirts of the large new town in experimental (see screenshot).

http://www.dropbox.com/s/zp7sexpc0hfrfw6/vlcsnap-2014-05-25-10h20m58s105.png

Also confirmed. Tried several batteries in various states which worked in other equipment. When right-clicking then selecting "Turn On" the choice disappears, but is still visible the next time you right-click the sight.

This was on a Hardcore server. Normal zombie encounters during the approach to the jail, and the player was standing up when it occurred.