Just Fixed it for Version 1.9.5.6. The Javascript wasn't able to retrieve the current Page Scroll after a Postback
Btw, one more bug. Not breaker, but...
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The problem is that I'm using mm/dd/yyyy, this example above shows dd/mm/yyyy. I'm not sure where it can be set in options, but I'm sure it can be taken from the user machine and used.
Dimi