Blocked web windows

So I finally found a use for a web window (a pre-filled Google search) and it comes up blank when published. It does work in the preview. Other sites like Wikipedia seem to work, but when I put in Yahoo or Google, I get a blank window. Are sites blocking our ability to do this?

Discussion (2)

Ok, this works with a Google custom search (http://www.google.com/custom) but this puts ads in a prominent space above the search results.

I think Google deliberately prohibits this behaviour to prevent site spoofing. E.g. running a site filled with scam ads with Google iframe in the middle.

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