Add Item error

This has been previously reported, but no meaningful solution given. When adding an item, after step 3, the following error occurs:

Fatal error: Objects used as arrays in post/pre increment/decrement must return values by reference in /var/www/html/omeka/application/models/Item.php on line 172

This is on a CentOS 5.x box.
Omeka 0.9
MySQL v 5.0.22
PHP v 5.1.6

The image is added however.

Unfortunately I cannot reproduce the error. We'll look into it further, but I notice that your PHP is an earlier version than what Omeka requires: PHP 5.2.x or greater. It is possible that this is the cause of the error.

Thanks for the tip. That apparently worked, the unfortunate thing for me is it isn't on the server I wanted to use, but I'll make do.