yeah, I have used mozilla and accidentally hit ctrl+enter a couple times. hitting ctrl seems to do nothing, but I did get to where I'm going anyway. The thing is, it takes a few seconds to start downloading the proper url. I don't pay for DSL to wait a few seconds to start loading an url.
Yes, I know that sounds assinine but it bothers me. On IE it's instant gratification.
FWIW, I heard Netscape was the original browser with the ctrl+enter shortcut in the version 3 days. But, it was removed because they thought it put too much emphasis on having a .com domain name.