As HTML, but the same thing happens when sent as plain text. I have not had a chance to test it with RTF.

I have also had the sending user turn off reminders to see if that would help, it did not.

It was not a distribution list but there were multiple people on the request.

Outlook 2010 is the user having the problems and it was sent from a user with Outlook 2007.

I have tested it with meeting requests inside and outside of our domain and the same thing happens.

We are not using an exchange server.

I have re-installed Office 2010 once already, I have deleted the mail profile and made a new one also.

I also just found out this same thing was happening to this same user on a different computer using Outlook 2003. Now I am thinking it might something with her email account on the email server, unfortunately I do not have access to that server.