When I upgraded to OmniFocus 1.1SP, selecting a message in Apple Mail did not enable the OmniFocus: Send to Inbox entry in Mail's Services menu.
Checking OmniFocus Preferences, I noticed the Clippings panel was offering to install Mail Clip-O-Tron 3000 (which apparently didn't carry over from OmniFocus 1.0). Pushing the install button restored Send to Inbox.
Checking OmniFocus Preferences, I noticed the Clippings panel was offering to install Mail Clip-O-Tron 3000 (which apparently didn't carry over from OmniFocus 1.0). Pushing the install button restored Send to Inbox.