http://fotosbyerika.com
I've searched and searched. There is obviously a problem somewhere. I just can't find it.
The Home button has strange symbols on it. As well, after the writing in About, there is a debug=
lettering. I guess it must be connected somehow to the problem with the Home button.

Can someone help me?

are you using the atahualpa automatic menu or did you build a custom WP menu?
What do you have in the 'Configure Header Area' option?

I guess it's the atahualpa menu. Automatic? I entered the information myself.
Under "configure head area" I have; %pages %logo %bar1 %image %bar2

Under "blog title" I have this;
margin: 0;
padding: 20px;
letter-spacing: -1px;
line-height: 1.0em;
font-family: BT tahoma, arial, sans-serif;
font-size: 240%;

I don't have a logo.
Was this any help?

I guess it's the atahualpa menu. Automatic? I entered the information myself.

where did you enter the information?

That theme has its own options page so that's where the changes were made. I made a lot of changes including the color.

ok, exactly did you enter where - go back and review what you did because somewhere you made a syntax error.