Since the update to ios 5.1 all attachments sent from my work email arrive on my iPad as Winmail.dat files. This does not happen on my android phone (the same email has the File correctly attached and readable. Furthermore, this problem did not exist prior to updating my iPad this weekend.
iPad 2 Wi-Fi + 3G
Troubleshooting winmail.dat files: http://support.apple.com/kb/TS1506
There are also a number of apps that support winmail.dat files
I had already read the page referenced... This did not describe my problem. All emails are being sent in HTML. And I should not need an app to open an ics or PDF file on my iPad... This all worked fine last week. The only change was the update to 5.1 over the weekend.
Email attachment problem on iOS 5.1
