[Tim Wood]

I'd say to trust your instinct =)

Could you try the following:

- Launch /Applications/Utilities/Activity Monitor.app
- Get OmniFocus all ready with the keyboard focus in the sidebar
- Find OmniFocus in Activity Monitor (the search filter on the toolbar is useful here) and click the Sample Process toolbar item
- Quickly (!) switch to OmniFocus and hit the up/down arrow keys on the keyboard repeatedly

Activity Monitor will split out a report after a few seconds of this which you could then post here or send via feedback.

Thanks!