How to remove padding/margin on h tags?

I'm 99% sure I'm not overlooking something here. I have the usual r开发者_如何学Goesets done, no margin or padding on the h tag, line-height:100% etc etc. but STILL there are about 2 or 3px padding above and below the h tags. It's the same on most major sites, so I'm guessing it's prob unavoidable? It may seem like a moot point, but it's SLIGHTLY messing up my alignment.

So is there some unavoidable issue where all fonts have slight padding around them no matter what you do?

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Don't forget implicit line breaks that can add "silent" space to layouts:

<h1>blah blah</h1>[space character here due to line break]
<h1>blah blah</h1>

would need to be:

<h1>blah blah</h1><h1>blah blah</h1>

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Here you go:

HTML

<div id="blah"> <div style="width:300px; margin:0px auto 0px auto;"><h1 style="color:#000000;font-size:12px; display:inline">This is my heading</h1></div> </div>

CSS

#blah
{
height:50px;
width:100%;
background-color:#B40700;
}