PEAR_ErrorStack and staticCallback(...)

Hello dev list. Had a smallish conversation on IRC about this, and it was suggested that I post to the list. Consider the following code: <?php require_once('PEAR.php'); require_once('PEAR/ErrorStack.php'); function static_callback() { echo "static_callback(...) called.\n"; print_r(func_get_args()); } PEAR_ErrorStack::staticPushCallback('static_callback'); PEAR_ErrorStack::staticPush('teststack', 100, 'error', array('test' => 'testing'), 'test error -- testing callback'); // static_callback() is never called ?> It SEEMS that staticPush never calls the callback -- I took a look through the code (ErrorStack.php) and I'm not sure why this happens. If this is a user (my) error, I offer my sincere apologies for troubling the dev list, but I believe this to be a PEAR problem -- please correct me if I'm being stupid (-: I would like some confirmation before I file this as a bug, but will be happy to do so if this is determined to be a bug. Thanks, S