[tidalboy]

I'm having the exact same problem. Would appreciate an update... I lost a half day's worth of reminders already.

For the sake of troubleshooting:
1.) iCloud sync is enabled.
2.) When OmniFocus is quit (not closed); Siri works perfect. Reminders are saved, and updated to iCloud, along with all other devices.
3.) Upon activating OmniFocus, Reminder is removed from iCloud... but shows up in Inbox as duplicate "Unknown entry" (exact wording escapes me; sorry).

Please update us!
Thanks!
tb