You some serious errors going on if you're seeing major differences between FF and Safari on Mac/PC. The changes should be extremely small (maybe a tiny bit different in the text rendering).
Susan here i am a great fan of this web site as it is dedicated to CSS & tips & tricks for the same, i did not see any better place than this. keep it up!!!
Remember to run your code through http://validator.w3.org/
If problems persist after validation, you can use some javascript to target certain OS's, but there really shouldn't be a problem.
Susan here i am a great fan of this web site as it is dedicated to CSS & tips & tricks for the same, i did not see any better place than this. keep it up!!!
Sheers!!!