Since Firefox tells users to "Search or enter address" in the location bar, I don't think it's correct to tell users trying to search that they're using it wron

Since Firefox tells users to "Search or enter address" in the location bar, I don't think it's correct to tell users trying to search that they're using it wrong. The issue described by fpgaminer is a legitimate problem. The fact that some may prefer stricter segregation between URL and search fields is a separate issue, as is the behavior by certain ISPs that triggers this problem.