Web player with Mac OSx not open a new window

Hi everybody, i have developed a game in web player plattform, and i am testing it on FF, IE, Chrome and Safari. On windows it is all ok, but with Safari on OSx with mac, i have found a couple of problems:

1: When i try to open a new browser window with a ExternalEval("window.open") call, it opens the URL in the same browser window and i loose the game. I neeed to open a new one.

2: I also use the Facebook SDK to post the scores on the user Facebook Wall. On windows Chrome it popup the FB login window, but with Safari it doesn´t work. I disabled the block popups on Safari.

Anyone know how to solve something of it?

Thanks!!