So far, you were working out the browser-specific problems on your own, read the mailing lists, kept up-to-date with latest bug reports, and searched bugzilla entries.
But why not leave CSS debugging to a man who cultivates this little perversion? And you could return to your job— professional web design.
My fees are moderate. My CSS service will save you from frustration, and help you provide a product that is robust, stable, and cross-browser reliable.