In certain PHP scripts, the opening < of <?php is matched with the first > in the code instead of the ending >, possibly because of assignment operators being treated like closing brackets. See the code below:

1 <?php
2 class ErrorInfo {
3 //Some code without less-than or greater-than signs
4 $errArray=array(
5 mbStringNotFound => 'The mbstring extension was not found',
6 //More code here...
7 ?>

Note that the greater-than sign in the assignment( => ) on line 5 is matched to the opening on like 1, instead of to the closing ?> on line 7.

I am on Ubuntu 11.10, x64, with Gedit 3.2.0-0ubuntu1. I will get the version of gtksourceview when I am back on my Ubuntu machine.