Uploading content for mailing results in empty message text and subject line

I'm creating a new mailing, and on step 3 I want to load an html file for the for the Content

After browsing and selecting my html file, and hitting next to go to step 4 I see the following errors in the Drupal log:
1. a php notice:
Notice: Trying to get property of non-object in CRM_Mailing_Form_Test->buildQuickForm() (line 169 of path/to/modules/civicrm/CRM/Mailing/Form/Test.php).
2.a civicrm debug message:
CiviMail will not send an empty mail body,

Previewing the message shows a completely blank are except

Subject:

even though I set the subject field

Neither HTML nor plain text files will give data. The file must be loaded because if you try to use a file without the unsubscribe tokens then you get a form error.

can replicate on CiviCRM demo site 4.4

http://drupal.demo.civicrm.org/

1. Create new mailing
2. Go through steps 1 and 2, whatever settings
3. Step 3 Select I want to Upload Content
4 Try to upload either a text or html file
5 Hit next – will get previously mentioned errors in log
6. Preview will be blank