I have red crosses where I should have thumbnails.
Permissions have been checked and are set at 755.
The GD Library is installed.

My server hosts believe it is a developer problem.

The address for the site is:
webantics.com.au/index.php?option=com_content&view=article&id=66&Itemid=85

Any help is very much appreciated.

Regards
Kathy

Did you remove the plugin?