I'm seeing the same thing with version 1.6:
http://img.skitch.com/20090422-ff5t8...kj61k82pjp.png
I read the post mentioned above, have emailed the support ninjas, etc.
Seems like this is
mostly a MobileMe bug–something not syncing the way that it should.
Build details:
Product: OmniFocus-1.6
Tag: OmniFocus/1.6/GM-v77.16.3
Date: 2009-03-11 21:44:36 -0700
Builder: kc
Host: tb104i.private.omnigroup.com
Revision: 110061