after upgrading to ZCS 7.1.0 users cannot see original raw headers of mail. When they click on "Show Original" popup window displays, asking for application to open with.
Popup window reveals Type: application/octet-stream
BUT this problem ocures only for some of messages in some of folders, let's say for about 1% of all messages. There is no any obvious rule, some text messages have problems, and some HTML also, with or without attachments.
Seems like message store or some index is broken.
Any idea how to fix this?