That error dialog is from Growl, not OmniFocus: Growl is confused about the notification OmniFocus is trying to post, but that's just Growl being confused because it hasn't been ported to 10.6 Snow Leopard yet.
According to the
Growl web page:
Quote:
|
For 10.6 Snow Leopard, do not install 1.1.6. We are working on Growl 1.2 for 10.6 Snow Leopard
|
(Unfortunately, Growl 1.2 is not available yet.)
Hope this helps!