Ubercart product titles are limited to 128 characters

Hi,
I'm using a custom content type assigned as a product class, and the title field is limited to 128 characters.

I originally thought it was a node import issue but has confirmed to be Ubercart
See http://drupal.org/node/627090#comment-2270994

How can I set the title field to allow 255 characters?

I also have the following modules enabled should that be having an impact:
Product Power Tools 6.x-1.10
Out of stock notificator 6.x-1.4

Thanks for any help