setting DIV width affects its used height

The following code should display nothing but it displays a black bar 19px
high (this is the computed height of the inner DIV element) as of IE7. WTF???


<TITLE >Problems in Microsoft Internet Explorer 7</TITLE
><DIV STYLE="BACKGROUND: BLACK; COLOR: WHITE"
><DIV STYLE="WIDTH: 200PX" ></DIV ></DIV
>