Your best starting point is to always use some kind of "w70> mechanism", like Eric Meyer CSS Reset or a framework like HTML5 Boilerplate , they help reduce differences between browsers (not all, but most of them). If this is not possible (the project is already completing the stage, etc.), you can always ask questions here, check Position Is Everything for error descriptions, Quirks mode , SitePoint link and various other sites (Google is your friend :)). Hope this helps.
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