But the reason I am here is because it seems that "www.facebook.com" is a malicious site which makes me think that this Opera malicious site detector is BROKEN. How can one of the most popular sites on the internet be malicious site?

"gustavwiz" You are being a smart ass because you are stating the obvious that helps no one. The fact is that it MIGHT NOT have been reported and that is an ERROR, a FALSE POSITIVE! YOU EVER THINK OF THAT POSSIBILITY SMART ASS gustavwiz!? How about you ask for CLARIFICATION of the QUESTION gustavwiz or explain HOW things get reported and possible work-arounds or even consider the person may want a work-around by ASKING a few questions. Do people have to explain EVERY MINUTIA for you to consider that there may be a problem?

*Alright, now Opera doesn't allow me to choose any "other" search engines to be my default. Is there a way I can turn of onmibox search completely? No search engines at all. Basically what I am interested is to get my local intranet DNS to resolve the keywords i type in omnibox, I'm not SEARCHING for anything.

Any help is truly appreciated.*

"Is there a way I can turn of onmibox search completely?"

Nope, you are screwed. I wish also that I could enter a web address using a current Opera browser in Linux without having to be careful that that isn't searched for by google or their other pet search sites, that when I enter an address, IT GOES THERE and is not searched for. As shmucker implied, SO MUCH for the FREE (as in liberty) browsing experience from Opera.