I get this message when I click on Private Messages:

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/class_hook.php on line 120

Warning: preg_replace() [function.preg-replace]: Compilation failed: unmatched parentheses at offset 14 in [path]/includes/c