I am running the latest Win32 binaries from the php.net download page. I am using the ISAPI module on IIS5. In php.ini I enabled DOMXML by uncommenting the appropriate line.

Calling the children function on a node that has a CDATA node as a child results in an access violation. Here's a script that reproduces the problem:

$doc = xmldocfile('http://tbhbuilding.blogspot.com');
$root = $doc->root();
$children = $root->children();
$children = $children[1]->children();
print_r($children[1]->children());

I would have generated a gdb backtrace if the instructions for doing so explained how to do it with the ISAPI module.