Website "moves" a bit

My website at http://www.oblivionro.net isn't properly vertically-aligned when you click on a different link in the menu.

For开发者_JS百科 example, if you go from the home page to the ventrilo page, you'll notice that the alignment of the website shifts to the right and down a bit. I know a fair bit about php, but I'm not that great when it comes to css and designing websites.

Anyone know what the problem might be? Thanks in advance.

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Your link doesn't work for me, but I can guess what the problem is. To fix it, add:

html {
    overflow-y: scroll
}

That will force the vertical scrollbar to always be visible, so there will no longer be a "shift" when you move between pages that do/do not have a vertical scrollbar.