Could you indicate an example of an improperly formatted line in the css, and what you've done to correct this? Then Christopher and everyone might see that they actually are mistakes.
Go to B&N and download the free sample ePub and extract the CSS and also download the CSS I've linked and you can then compare the two and see what the differences are between the two.
Could you post the excerpts of what's wrong? You've already got both of them, it's just a quick C&P of the problem portion and its correction to demonstrate the error. Saves work too, that way it's only one person that has to go to effort instead of everyone else in the thread checking for themselves. Especially for folks that might not have any familiarity with CSS and so wouldn't necessarily know what to look for.
He's not saying he in particular doesn't believe you, he's saying that your position would be stronger if you showed that bit yourself.