This method of horizontally centring a 'shrinkwrapped' DIV should work in modern browsers like FF3, IE8, Opera, and Safari (WebKit-based).

It works by standards-compliant browsers rendering the centred DIV as an inline-box, and its parent element centring the content.

Note that the HTML 4 STRICT doctype (transitional should work too) at the top is CRUCIAL to get this to work in IE8. Without any doctype, or with a non-standards one, IE8 will drop into quirks mode and this CSS centring won't work. Using this correct doctype makes IE8 render in IE8 (standards) mode, so the centring works.