PHP_Chimp - 8:15 pm on Dec 18, 2007 (gmt 0) You can also get rid of the i modifier, as it isnt needed.
Just thought -
Words with a - in will also match the regex. Although most people dont use then, they are valid in words. So you may want to make it clear to people that they cant use hyphenated words (may be a big problem for surnames).
You can also get rid of the i modifier, as it isnt needed.