NEWSFLASH: Opera browser leading cause of insanity in web developers

Is it just me or is Opera completely nuts? I mean, it's bad enough getting css designs to work in IE as well as other standards compliant browsers, but it seems that making things work in opera is even worse.

For instance, i just spent about an hour poring over my code, struggling to figure out why the heck the whole page was displaying about 15px from the top of the window, when both IE and Firefox displayed it properly, right at the top. I finally figured out that setting margin: 0 isn't good enough for Opera, it needed a padding: 0 attribute in the body {} element as well.

Anyone else get driven mad by this software?