Powerblogs has really great users. Today a new user helped me find (and hence fix) the following bugs:
Fixed the documentation for the List Post Template and the Individual Post Template.
Also, fixed an off-by-one error in the script to rewrite history (modify the dates on posts).
Update: The rewrite history bug is now actually fixed. It turned out not to be an off-by-one error, but a bug about how daylight savings time was handled.