A few weeks ago I noticed changes in browser's behaviors…
1) My IE 7.0.6000 no longer prompts for Click To Activate :)
2) My firefox 2.0.0.13 no longer required a reboot after installing Silverlight … If you had not noticed, using silverlight.js on IE allowed you to instantiate silverlight plugin right after installing , but on other browsers it required a re-start…
I pinged Piotr, our deployment PM, asking if he was seeing the same and he upped it sharing that he had a way to instantiate silverlight on ANY PLATFORM and ANY browser WITH OUT requiring A RE-START… [call me a geek, but I was happy]..