Andrew attempted to give the most complete answer but the truth is the answer is lost in the dim and distant past. There is nothing you can do about it. On every install a superadmin user is created with username "admin" and userid "62".

Since this is a common "feature" of the older Joomla installs, it could potentially be used in a sort of attack on the site. Fortunately, as of the Joomla 1.6 release, the installation allows you to select a username of your own (while still suggesting "admin") with a new change to the user's ID - 42 instead of 61.

Let's have a little fun, shall we? Here is what we'll do. I'll ask ZendCon or PHP trivia via twitter (http://twitter.com/zendcon) and the first person to email me the correct answer at contest@zend.com will win a prize.

Up for grabs are ZendCon trading cards, books, elePHPants and copies of Zend Studio. Remember, you have to be following zendcon on twitter to get the questions and answers must be submitted via email (no DM, IM, tweets or IRC answers will count).

Here's a question based on a recent PHP bug report which shows why DOM is fun. [...] But how do you retrieve it (the namespace URI of the root node) using DOMElement::GetAttributeNS()? What are the two magical input parameters to coax that value out?

The code is simple, but it's an interesting problem - anyone have any answers?