Just as a little extra clarification - the fact that you saw "<a onmouseov" in the place of the menu text meant that the server went down as you were having the page transfered to you - a rare situation. This is probably a lot more information then is required, but it will show you why the menu appeared so in case you didn't already know.
"<a onmouseov" is the cut-off form of an anchor tag (<a>) with the onMouseOver name and value = for calling JavaScript on a mouse over (used with CSS through DHTML to show the dropdown menu). The fact that this code was "chopped off" means that the next packet of information never came - and your buffer was left half full. This means that it probably sat there for a while doing nothing while still showing a progress bar for loading the page.
Anyway, so in a nutshell, the server went down as you were viewing the page - get used to the server going down. I have a log with every error that I have ever seen on this website - which is growing to almost a megabyte (it gives me an inside knowledge of how the SQL queries work - you should probably remove the debug code from the error page to prevent hackers from gaining information over time like I have).
You can expect the server to go down often - so it shouldn't be a surprise when it does. This is definately nothing new.