If you sync via iDisk/MobileMe...
 

...stop it! :)

Okay, but seriously, Apple is killing off MobileMe on Saturday, June 30. You need to find a different sync solution before then.

You could set up your own server.
You could find another WebDAV service provider.

The easiest solution is to sign up for a free Omni Sync Server account. [url]https://sync.omnigroup.com[/url]

Hi Lizard et al at Omni,
I tried using Omni Sync again today (having attempted this much earlier, when Omni Sync was still beta), but instead of sync'ing, it continually asks me to provide my 'Name' and 'Password'. I deleted all the Keychain entries that had anything to do with Omni (as was suggested in another thread somewhere), but still the problem persists.
Do you have any advice?
Best wishes from Germany,
F.v.Bieberstein

Are you able to sign into the Omni Sync Server on the website? If you do so, there will be a button to send the proper settings to OmniFocus on the device from which you visited the website.

If you are not able to sign in, make sure you are using the username for the account, not the email address you used to sign up. If that still doesn't work, and the [URL="https://www.omnigroup.com/sync/lostpassword"]Lost your password[/URL] link doesn't help, you'll want to contact the support ninjas directly for assistance. +1-206-523-4152 M-F 10-5 (GMT-7) or email [email]sync@omnigroup.com[/email]