My entire website moves horizontal a couple PX (Except for the background) when opening a new Page. It only does it on a certain Page.

Any Ideas?

1) What version of Atahualpa, WP and PHP?
2) What is the website?
3) What browser - did you try it with anothere browser?
4) Does it happen if you switch to the default theme?

This is probably because one page has a scollbar and the other one hasn't because it is shorter than the browser viewport. The scrollbar takes up 20 pixels. This is normal behavior although it doesn't happen in IE which reserves the space for the scrollbar

There's a setting Style & Edit FOOTER -> Sticky Footer on short pages?

Set this to yes and edit js.php

if (jQuery.browser.msie || jQuery.browser.safari) {
var bfacompensate = 41;
} else {
var bfacompensate = 21;
}

Add or remove (not sure right now whether you need to add or remove) 5 from both these numbers to make short pages have a browser scrollbar too.

It seemed to have solved the problem.

I added 5 to both & Enabled Sticky footer.

Thanks.