Preview doesn't show article contents when creating a campaign...

joomlamailer version: 1.7.2
Joomla! version: 1.5.21
PHP version: 5.2.17
MySQL version: 5.1.54-1.el5.art
Browser: Same problem in all browsers

When I create a new campaign, or edit an existing one and I add an article to be show in full, the preview doesn't show the article contents at all.

However, if I then save the campaign and click the little preview icon in the list of campaigns a lightbox opens up and it previews the campaign correctly.

Why is this?

I've also noticed that when I click to include an article in 'full' and then save, if I edit the campagin it's been reset back to 'intro text'. This is also a bug surely?

Otherwise the component is working fine...

Thanks!