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Happens in IE9, Chrome and Firefox
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Have you ensured that your pop-up blocker is set to always trust the site? Not just 1x? I could see a pop-up blocker (especially the one baked into IE) posing issues with a post back if the URL that it is re-writing is different from the original (as often it is because once you click for example the 'Return' button after a module installation the default action is to return the user to the main page and close the pop-up.). I'm not sure if that will answer your question as I have not experienced this myself. However, I mention it because I have all of my pop-up blockers turned off completely for any site I'm working inside of.
Make it a great Day!
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Did you try to clear the browser cache ?
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