We've just upgraded our Zimbra test installation from 5.0.0 FOSS to 5.0.1 NE; and we can't view attachments as html. Actually, only viewing of txt files work. All other allegedly supported formats tested show a download window and the file is downloaded.
- .txt (the only one that worked)
HTML preview is activated in the default COS for all users, and they all have the same issue.
Did we miss something when we upgraded?
BTW, we upgraded through this path:
- 5.0.0 FOSS => 5.0.0 NE
- 5.0.0 NE => 5.0.1 NE
no testing have been done during 5.0.0 NE, and it's NOT a production environment, yet.