??

Extra padding on bottom & right (fixed with #544):
Popups that uses auto size displays a extra padding on bottom & right, using browsers that uses W3C box model: Chrome, FF, Safari, Opera and IE9 not compatibility mode.
Not correctly calculated the position of close box (fixed with #533):
Using IE except IE9 not compatibility mode.
A border causes addicional padding (not yet proposed a patch):
Popups that uses auto size displays a extra padding on bottom & right.

Padding is shown green and content is shown pink.
The padding for the first case "padding5" is always 5px!, and in the second "only border2" is always 0px!