[Brian]

curiousstranger, I'm sorry for the trouble this is causing! Please contact us - while this is causing the same error message to appear, it sounds like a different underlying problem.

The issue being discussed in this thread should only appear during the first sync after the application is relaunched, and it shouldn't prevent sync so long as you say "yes, trust the server".

If you send email to "urgent@omnigroup.com" or call us at 800.315.6664 we can investigate this with you. Again, I'm very sorry for the trouble.