There is sometimes an issue in IE7 and IE8 when you click on the navigation that you get a white flash or the pages seems to reload momentarily giving the web pages a “jaggy” transition.
There are a few things you can try to solve the issue:
1) IE renders the page before all CSS has loaded. Solution: Include an empty script-element BEFORE the stylesheets.
2) Include meta-tags for page-enter and page-exit transitions:
3) IE chokes on the content-type meta-tag; remove it.
4) Minimize CSS and JS files.
5) change background-color of body or html