Email headers not showing on initial load in 1.7-rc4

[SKaero]

I tested with the account you send and was able to briefly see the problem, after switching the email to plan text all the headers showed up as normal and the problem happen again. I noticed that you have a larger number of plugins enabled. Can you try diabling all the plugin and see if the issues continues? My leading guess is that either a outdated plugin or conflict between plugins is causing the issue.

[ehymel]

I appreciate the time you are spending on this.

I commented out ALL plugins in the confing/config.inc.php file and just to be thorough (not sure if needed) I deleted all files in the temp/ directory.

Unfortunately there is no change. I'll leave all plugins disabled in case you want to have a look. It seems 2 plugins remain no matter what (jqueryui and filesystem_attachments).

[ehymel]

As far as switching to plain text, I think that anything you do to refresh the page after the initial load will then appropriately show the headers. If I go to my settings and turn off HTML views of messages I see the same behavior with new messages not showing headers on initial load.