That's because your browser is caching the old header. Force a refresh (Command-R if you're still using a Mac). Note that the full header only appears at the top of pages - so if you're on the 18th post in a thread (this one, for example), you'll only see the secondary header (has the thread title in it).
I also noticed today (I was in Trenton) that on the PC, with a wide monitor (22"), the banner isn't wide enough - I'll need to add another pic or two. I'll take care of that...