Error Creating a New thread since upgrading to Ubuntu 11.04

[kunik1962]

I am getting the following error when trying to create a new thread. Now the only change I made was upgrading to Ubuntu 11.04. There is no impact posting in an exiting thread

preg_replace_callback(): Compilation failed: unknown option bit(s) set at offset 0

The error log says its in this file.
library/Lgpl/utf8.php:343

 

[kunik1962]

umm did another update to ubuntu and its fixed, sorry about that