Editing a post not working

I can save character changes such as adding more or deleting text. But when it comes to styling in the GUI editor the changes don’t save. I narrowed it down to my CSS. When I remove my styles re setter the changes come through. But when I add in my styles re setter the changes do not appear. It just appears as plain text.

I’m using this CSS reset.
http://meyerweb.com/eric/thoughts/2011/01/03/reset-revisited/

Like I said, WITH the reset it DOES NOT work.
WITHOUT the reset it DOES work.

Any ideas/suggestions?