My theme (heavily customised Siriux) is of a fixed width and is centred.
Firefox 'jiggers' when changing pages with/without the vertical scrollbar.
IE seems to be able to 'ignore' the presence of a vertical scrollbar and
so the centre functionality is not amended by the width of the vertical
scrollbar - present or not. Is it due to one of the core utilities...
am unable to stop Firefox 'jiggering' and it's a little distracting;~/
[postedit: URL removal]
----best wishes, Robert