phpbb3 Board VERY small code problem - preg_match(): Compilation failed:

Very small code problem on a phpbb3 board I have a message board here: [login to view URL] When you make a post and then hit preview you get this error: [phpBB Debug] PHP Warning: in file [ROOT]/includes/[login to view URL] on line 84: preg_match(): Compilation failed: character value in /x{...} sequence is too large at offset 88 [phpBB Debug] PHP Warning: in file [ROOT]/includes/[login to view URL] on line 84: preg_match(): Compilation failed: character value in /x{...} sequence is too large at offset 93 [phpBB Debug] PHP Warning: in file [ROOT]/includes/[login to view URL] on line 84: preg_match(): Compilation failed: character value in /x{...} sequence is too large at offset 109 [phpBB Debug] PHP Warning: in file [ROOT]/includes/[login to view URL] on line 84: preg_match(): Compilation failed: character value in /x{...} sequence is too large at offset 90 Quick code fix I am sure. Here is the code on line 84: if (preg_match($regexp, $this->message)) else { foreach ($bbcode_data['regexp'] as $regexp => $replacement) { // The pattern gets compiled and cached by the PCRE extension, // it should not demand recompilation if (preg_match($regexp, $this->message)) { $this->message = preg_replace($regexp, $replacement, $this->message); $bitfield->set($bbcode_data['bbcode_id']); } } }