I have been looking into the issue and the links are only working on the main page as they should. Do you have another domain with /wpa/ assigned to it?
Hmmm. Its just the subfolder where i installed wordpress. (…/wpa)
The menue has this individual link. But the menuelink just for about, projects … changes on sublevel pages like the blog etc …
You never heard about this problem?
All the Best Matthias