* [Mail/Parser/HTML] Fixed an issue that corrupted some UTF-8 characters when displaying an original_message.html attachment in the browser if the PHP 'tidy' extension was loaded.  These attachments worked fine if downloaded instead since they skipped the tidy/purify step.
* [CHD-3660] [Support Center/Attachments] Fixed an issue with attachments being uploaded in Support Center contact forms.
6.6.2-dev checkpoint