[Brian]

We do think that the application is holding onto some old or outdated information about the wireless network you're last synced over. If the wireless environment changes at all, we may lose our connection to the server.

We'll fix this in an update - don't have a release date for it yet - but in the meantime, folks can work around the problem with the following steps:

Double tap the round "home" button on your phone.
When the App Switcher tray appears, tap and hold on OmniFocus' icon until a red badge with a minus symbol appears.

Tap the red badge; OmniFocus will quit.
If you press the home button one more time and re-launch OmniFocus, that will force the application to re-connect to your wireless network. Sync should work now, but you may have to repeat this process later.

We're really sorry for the inconvenience this causes!