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Not sure what you are referring to as “your code snippet for putting a Google+ like button in the header”. There are various ways to do it. But pages ‘hanging’ always mean you have malformed javascript, a very easy thing to happen. Let me look at your code, and perhaps explain further what you did with “my snippet”.
You should be using the custom_js module for it, otherwise you have the annoyance of needing to redo it at every upgrade if you put it in the theme code, which is unnecessary with the module.

Nigel
My personal kiwitrees site is www.our-families.info