Flash cs3 problem, possible bug?

hi guys, I’m doing something extraordinarily simple in cs3 but getting rogue results.

all I’m doing is creating a class that extends movieClip, attaching it as the document class in cs3 then tracing stage.height and stage.width in the class.

no errors in compile but my movie is set to 800x600 and the trace outputs 801 x 662.4000000000001 ??

anyone know what might be causing this is its messing up all my programmaticle alignment!

thanks in advance,

freshcut
www.freshcut.org