I develop a web application and we test it on browsers like Firefox and Internet Explorer. During our development we test the application on Firefox 3.5.2 and our testing team tests the same on 3.5.6 and found the UI looks good. But all of the sudden the client complains that it doesn't look good in 3.5.8.
How do we handle these minor version issues? How can we check the browser compatibility during development and during testing?
Is there any tool to test the application on 3.5.X, X being all the minor versions?