Comment #5 on issue 1945 by [email protected]: call SetTime(0,0,0,0) and throws "this is not a Date object." if Date() object has been subclassed
http://code.google.com/p/v8/issues/detail?id=1945
Can't create a proper test case but it happens even in our app build on top of ext gwt 2.2.5 with Chrome 17 (16 was fine) at least on Windows.
When using a DateField the TypeError problem appears randomly - it's only a guess :) but it seems to be something like a race condition when the Date object is created but not ready yet for some methods to be executed.
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