Let me start off by apologizing for the older themes. I'm still new to CSS and web design. I had put a little bit of code at the top of all the old CSS files to reset margins and padding on all the elements. After research, I've determind that was a bad idea. I've removed it from all the themes and made adjustments to a few classes to keep layout the same. I did only a quick spot check though, so I may have missed something.
If you have an old theme, I strongly recommend you update it. Or if you notice anything really wierd, let me know and I will be glad to help in my free time.