I just switched over to the blue theme, and the navigation seems to be cut in half. I think the content below has risen up to cover the black menu bar half way. However, when I fill the menu to the max with menu items so that the search bar is squished to the right, the problem goes away. Also, it is important to note that the green version works perfectly.
I would provide a url, but the site is on a test server. I would be happy to email anyone a screen shot who is willing to help.
Sorry for being vague. It seems that adding a height of 45 to the main navigation ID solved this problem. Later I discovered that I was not switching over to the blue skin properly, which was causing some other inconsistencies. I eventually just copied all the blue images to the green image folder and changed a few colors in the css. Now the blue is working perfectly. I know this is not the proper way, but it is the only way I could think of to make it work.
In any case, all is well. Thank you for all the great support in this forum. You guys are very responsive.