[Ken Case]

I believe there was a note about this in the release notes for OmniFocus 1.7… Ah, yes, here it is:

Updated our AppleScript terminology to use "open quick entry" rather than "activate quick entry". Hopefully this will eliminate the problems people have occasionally encountered in trying to activate the app itself. (Compiled scripts which used our old activate verb may need to be recompiled, however!)

Hope this helps!