Forum Errors when previewing thread
 

Hello, I've got this error for a while now and I'm wondering if there's a solution to it.
I'm getting the errors when previewing a thread.

Here's a screenshot of the errors:
http://i.imgur.com/BsSnx.png

Code:
Warning: array_merge() [function.array-merge]: Argument #2 is not an array in [path]/includes/class_bootstrap.php(430) : eval()'d code on line 21

Warning: array_unique() expects parameter 1 to be array, null given in [path]/includes/class_bootstrap.php(430) : eval()'d code on line 21

Warning: implode() [function.implode]: Invalid arguments passed in [path]/includes/class_bootstrap.php(430) : eval()'d code on line 21
Any help would be great.