wkrsz

This shit has been bugging me for too long, so I went on a hunt and found a workaround. 

The Symptoms are as follows: 
  * Clicking the address bar results in a 1-4 second delay
  * Opening links in new tabs results in a 1-4 second delay
  * +T results in a 1-4 second delay
  * `PressAndHold[<pid>]: IMKServer Stall detected` is present in `/var/log/system.log` at the time of the hang. 
  
It appears to be to do with the PressAndHold helper - the thing that shows an IOS style selection of accents when you hold a key down.
The fix may have some unwanted effects, I haven't really noticed any.