I was putting the new and very useful recurring task feature through its paces, when I ran into behaviour that I don't think is intended.
I want a task to repeat on the last day of each month. Not the last specific weekday (Monday, Tuesday, etc) in a month. The last one.
So I set it to the 31st of March, set it to repeat "Monthly on the 31st," as was the option provided to me, and when I marked the task as done, it jumped to the 31st of May, rather than the 30th of April, skipping two entire months in the process.
I don't think this is especially useful to anybody as it is currently implemented, and in this case should attempt to find the latest day of the next month. "Monthly" is pretty clear in what it means.