I created a webdav server at home on my local network.
I can sync in both directions, and can see all my changes so far.
But when I am away from my local network OmniFocus complains, it pops up a dialog every 60 seconds with a 404 error.
Can you please implement something similar to the method Apple uses for Time Machine and simply change the sync icon to indicate the sync failed?
Or stop trying the server every 60 seconds.
PLEASE!
For those interested in setting up their own WebDav server I used these instructions..
http://www.gregwestin.com/webdav_for_ical.php