iPad 4 safari bug?

Hello,
If this isn't the right place for my raising this issue, please let me know
what is!
I've discovered what appears to be a pretty significant bug on Safari on my
iPad 4. The following dead-simple test code produces a tone almost a full
step below what's expected.


      var context = new webkitAudioContext();
      var osc = context.createOscillator();
      osc.connect(context.destination);
      osc.frequency.value = 440;
      osc.start(0);


Here's the code in a web page (note that it works on Safari only):
http://www.morganpackard.com/webaudio_test/OscillatorTest.html

All browser/platform combinations I've tried produce the same pitch, except
for Safari on iPad4 iOS 7.

Is this a known issue? If not, what's the best way to alert the Safari
developers to it?

thanks,

-Morgan

-- 
===============
Morgan Packard
cell: (720) 891-0122
twitter: @morganpackard