Internet Explorer 6 <select> Causing Repaint/Redraw/Flash of Screen

I have a large page (greater than 3000 elements). On this page, I have a couple of <select> elements. While the page is loading, there is an overlay that appears over the page. When the page has finished loading, I can clearly see that the <select> elements are not yet visible. Suddenly, the page goes completely blank (minus the background color), and there exists a rectangular box where the 开发者_运维问答<select> elements should exist. Then, the page redraws itself and everything is fine. I am trying to determine the cause of this. Unfortunately, I cannot provide a link to an example page, as I am unable to reproduce this issue. However, it appears to be a combination of large DOM structure plus IE6 plus <select> elements that appears to cause this. I must support IE6, so ditching the browser is not an option. Any insight into this issue would be greatly appreciated.