I too had the same thing happen to me, on the same day (night time though, but same exact date as OP). What happened -- Went into Paypal account, signed in fine through https secure url and the download alert bar at the top of screen mentioned that Apple wanted to load a download, and if trusted to allow. I didn't do it, because I thought it was odd that while in Paypal secured site a download alert was there. It was the horizontal download bar that runs at the top of the screen, when asked if you want something to download -- not a pop up box. Using IE7, still have pink banner in Paypal mentioning that I should upgrade - but if it matters for this instance that is the browser in this case for me. Not sure what browser OP is using.
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