Good news! The latest "daily" version of Graham's GPE packages have these fixes to GPE Calendar (the close fix, not the week starts on Sunday fix) and GPE Summary. Follow the instructions earlier in this thread on how to add the "experimental" version of Graham's repository, but replace "experimental" with "daily". The version number you need is 20080616

Graham has stated that there will be a new version in extras-devel and eventually extras with these fixes in it unless he hears unfavourable feedback. I am trying the packages out now and like the other changes Graham made.

There is no longer an "auto refresh" mode in GPE Summary. It now reflects any changes made to events or todos when they happen. When you first close the new version of GPE Calendar you see a message warning you that you will not be alerted with alarms unless you are running GPE Summary or keep GPE Calendar open. You can "close," "iconify," or "cancel" and have it remember your answer.