UPDATE2: Opera fixed it, but on Firefox4 right:0 still doesn't start at the element's border when a right padding is applied on it's relative inline parent

UPDATE: On Opera11.01 (and Firefox) right:0 doesn't start at the element's border when a right padding is applied on it's relative inline parent

The blue square is out of the red square of all other browsers (Firefox, Safari, Chrome, even IE) but not Opera

Opera seems to start "right:0" in the box, while other browsers includes the padding-right to the dimension and starts the "right:0" at the padding