[emontero1]

Evidently, the author got a bit carried away there. The implication that just because your HTML works in Safari means that it'll also work in IE or Firefox with "minor tweaks" is simply bogus. Anyone with any significant web development under his/her belt would vehemently disagree. I think the author is just an ardent Safari user. That's all good and dandy if you ask me. However, we should call it for what it is: that was a blanket statement. As such, it lacks verifiable, factual information.

[mikeyur]

The only way I can see this is when talking about Firefox. I have built stuff using Safari and when I test it out in FF my padding is off by like 5 px or something silly.

Using another browser like IE usually breaks the whole thing.