I\'ve searched high and low for this and can easily reproduce it. Running absolute latest PHP SDK and the JS is coming directly from facebook over an HTTPS connection. My \'
It seems like a bug of FireBug :)
steps of reproducing: http://code.google.com/p/fbug/issues/detail?id=4991
reported: https://bugzilla.mozilla.org/show_bug.cgi?id=701029
discussed: http://groups.google.com/group/firebug/browse_thread/thread/2517d5f867b9f526/90f066856b45786f
so take it easy :)