[TYPO3] Condition with userFunc doesn't work at all

[Bas v.d. Wiel]

Hello all,
Following the instructions in TSRef I created a PHP function in
localconf.php like so:

<?php
....all configuration stuff....
function newVisitor() {
  return(true);
}
?>

And I'm calling it from TS with a condition block:

[userFunc = newVisitor()]
..
[end]

The function never gets called though. Am I missing something here? Is
the TSRef maybe not completely up to date anymore? If I put in a die();
call, or t3lib_div::debug some variable, nothing happens either. This
leads me to believe the function never gets called at all. Please help!

Bas