Or maybe it might be chrome itself actually. I'm using the latest beta of chrome, and i notice that my stopwatch function appears to not follow the variable's delay value for "Every X Seconds" after a second or two, it will speed up for some reason. This does not happen in Firefox though.
Here is the example and see if you guys get the same result (excuse the hideous scale on the stopwatch, as i am just making sure you see the problem)
dl.dropbox.com/u/39646614/chromebug.capx