Ah yeah, the browser would have eaten it! :)
The full DOCTYPE doesn't need to appear on two lines - it's only on two lines to make it easier to read - it just needs white space between the two parts. I always write it on one line.
Wikipedia: Quirks mode [en.wikipedia.org]
Quirks mode and strict mode [quirksmode.org]
Activating Browser Modes with Doctype [hsivonen.iki.fi]
After all this talk of DOCTYPEs and Quirks mode I don't think @Kickedout's problem is purely a DOCTYPE issue. I think there is something else amiss. Perhaps the other elements below the absolutely positioned DIV are wrong (perhaps because of the DOCTYPE) and so they don't line up?! Are there any other styles involved? #bla?