Google Documents and Google Apps

I've been loving Google Apps lately, but there have been some headaches as I reconcile my old Google account with the new Google Apps account. Gmail was easy enough: just set a filter that forwards all new messages. I managed to export my important calendars and bring them into Apps, and the sharing settings have been updated by hand. Docs is a bigger headache: I have many documents of my own, as well as a number of personal and professional documents shared to me by others.

The migration tool in Google Apps leaves something to be desired:

Sounds good, but results in this error:

The manual migration continues.