When a week isn't a week
 

I'm using OmniPlan 1.1.2 and have a project's default calendar to use a work week of 7 days (instead of the usual M-F 5 days). However, when I assign effort of 5 days to a task, it becomes 1w instead of staying at 5d. Similarly, a task that is planned for a calendar week (say, Thursday to Thursday) shows up as consuming more than a week.

I'd appreciate any advice how to reconcile the schedule with the effort data.

That's in the Project: Formatting inspector. Specifically, you can either make your project have 56 hours per work week (8 per day * 7 days), or you can turn off display of weeks of duration entirely (if you'd prefer to see, say, "8d" rather than "1w 1d").

Hope this helps!

Problem solved
 

Thanks, Greg, that solved my problem.