Hi Tom,
You have probably copied your menu from page to page.
Then button is stuck on which is your copy source.
To solve, see:
<div id="buttons">
<a href="index.htm" class="but but_t" title="Main page">Now</a>
<a href="today.htm" class="but" title="Today's observations">Today</a>
<a href="yesterday.htm" class="but" title="Yesterday's observations">Yesterday
...
</div>
You see the "but_t" that is the "focus" trick.. move it for all pages
Regards,
Jacques