I wish there was some way to validate a survey on the mobile device before collection.
We have had people who have downloaded older versions of a survey and haven't bothered to update the project and go off and collect then tell us that they can't submit.
I wish that if there was an internet connection for a device that it would check the submission url and schema before opening a project.
And while we're on this topic, is there any to extract old, out-of-date data from projects that won't submit? :-/