Maybe its different in America, but neither 6 nor 7 has ever showed me the JS error message. The little hazard sign appears in the bottom left corner of the status bar (Done, but with errors) but the pop-up only appears if I double click it. It also has an option on the pop-up (which you can see in the screenshot) of whether to show it every time or not.

I’ve gotten those error messages quite a bit in the past. I don’t use IE enough anymore so my memory might not be right, but if I recall checking the box will only ignore the warnings for that particular type of JavaScript error. If a different type of error occurred it would still show the warning the next time.

That is actually an awesome idea, and I really wish that was the case. So many sites have started to embrace Greasemonkey, such as Gmail, and I’m sure many more would if it became more of a standard browser feature.

Its a shame that this and Greasemonkey couldn’t be standardised – it seems silly and kind of pointless to need different scripting apps, when the whole point of Greasemonkey is to provide extensive functionality without needing to install more extensions. They should work on making the frameworks handle the translation from script to the browser’s own workings so that everything becomes cross-platform in the same way as Gears and AIR.