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Right after the dialog closes, in the main window the whole FB related section [ "Like " button, facebook logo and the text "Be the first of your friends ..." ] just disappears.
You need to explicitly refresh the page to view them back.
This happens consistently and it happens in both IE and chrome.
I can't repro this. The dialog disappeared and the DIV changed to a disabled Like button, with a popup to enter a message.
Doesn't seem to repro any more.