Czuch: IE7 has a rendering mechanism that waits for the whole page to load before drawing it.
Previous IE versions and most other browsers start rendering the page as soon as it is downloaded. So, they start by rendering the left column, then make space for the central part and finally shrink the whole page to make space for the right column. This is why it seems like the page is jumping from side to side until it is completelly downloaded .
Most browsers try to display the page as soon as possible to give the impression that they load pages faster. Most of the time there is no problem with that. Except in cases like BK where the layout of the page can't be accuratly determined until close to the end of the page, because of that right column.

Opera does have a setting to only start rendering the page after a few seconds. Not sure if Firefox has anything similar. Otherwise, if it really is such a big deal, seems like IE7 might be a good bet for you.


Another option would be to convince Fencer to put the code of the right column before the central part of the page. Stylesheets should help make sure that the whole thing falls into place properly... unless, of course, someone has them disabled