I have a mate who is building a site and it looks decent in Chrome but falls apart when you zoom using IE9

Any experts know if there is a programme that can do a quality check before publishing highlighting the errors ?

er!, you could try ie9

For whatever reason, all the top browsers handle screen formatting differently. You get code that looks great in IE9, but it looks like crap in Chrome or Mozilla. The only way to handle it ( that we have found and use) is to create css files for each browser and have the code check the user's browser type on page load, then set the css file based on what browser they are using. Yes, it's a pain in the ass, but that's the way it is.

Check this link for testing suites.

http://www.noupe.com/tools/the-importance-of-cross-browser-compatibity-tips-and-resources.html