Lots of people having trouble with unity. Here’s my comment which I made on a Unity game recently.
“I’m another user who can’t get Unity to work. It’s frustrating as quite a number of unity games have started getting badges. Before people say use a different browser etc. I’ve tried and had no joy. Besides, the people at Unity and developers should ensure that their products / games are cross-browser /cross-platform compatible. (As a web developer I couldn’t get away with designing sites to only work in one or two browsers.) The Unity experience is pretty poor for most people at the moment as NPAPI is being phased out by Chrome (I think others too.) and general backwards-compatibility issues with different versions of Flash / Unity.”
Not sure what Unity are doing about this, but they need to pull their finger out. It’s not acceptable to expect users to use a very narrow combination of software.