Newbie question

My left sideboxes are moving to the center of the screen and back to the correct position when moving from page to page and that has received the most complaints from customers in the first 7 days after going live.

At first, I thought that it might be a function of connection speed but at home my connection speed is 1.5MBps. At our office, we have 5MBps dsl where the jumping is significantly more annoying.

I don't think that I have made changes that would affect that; but then, I won't discount anything.

Ver 1.3.8a with all security updates.
mystik template
I don't remember installing any addons, yet.
I have changed page width.
I have searched sidebox threads.

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