I re-did the upgrade here tonight. I still have a few things to fix up, but I am hoping I can handle that. I need to get my theme reinstated, which may take a bit of work (not sure).
More strangely, I am using the image module to store the photoblog I created for project 365. That image gallery is not showing the images any more. The image tags are missing from the html. Very weird.
Also, I had some customs views using the views module. Those are gone too, but I did export them from the version 5. Importing fails 🙁
The one that will take the most work is my custom module for showing posts on this date in previous years. I rely on the archive module, which has changed, and has thus broken my module 🙁
Happy to have this site at drupal 6 though