I'm testing on my iPad where I also have an IMAP account so comparisons between IMAP and Mobility is easy. GW system is "English Only" 8.0.2 HP2.

In my Mobility account with html emails most links don't work even when the email appears to be rendered correctly. It's as if the URL is not being read correctly.

I have not validated this but html seems to work better when hidden attachments are not blocked.