Running Drupal 6 !
Somewhat in the heat of the moment I decided to move to Drupal6. I was not really planning on doing it until after a few months, but somehow the excitement took over to just make a copy of the database and test-run it on the copy.
I started over with the fresh Drupal6 codebase, copied over the relevant content from my settings.php and pointed it to the copy of the database. Without installing any module I just did an update and it simply worked.
My theme was gone ofcourse, putting my Burnt theme back (with my own CSS modifications) was simple. Some of the blocks were missing because I actually forgot to put the modules in place. So I looked for the ones that existed:
AutopathPathauto, Captcha, Event and Token. And was lucky enough that only these were necessary for all of the functionality. Sadly the Recent blocks module seems to be unmaintained, so I switched to the default Popular content block, not the same but good enough for me.
Then I did another update for the new modules. I got a problem with the Event module update, which looked as if a second run could cope with it and indeed, a second run reported no errors.
In the end, I was so excited of the result that I just switched the old Drupal5 with the new and shining Drupal6 one, et voilà...
No major problems for me. The site looks mostly identical :-)
Update: There is a minor issue with the included Update status module. Drupal tells me that my Burnt v6.x-1.6 theme is out-of-date and I should 'upgrade' to Burnt v6.x-1.5. I guess I have got a newer release than Drupal has in its database. A simple version comparison could prevent this.
Update 2: I noticed the Comment notify module is also missing for Drupal6. The upgrade-excitement is still justified. I am not listening to you. Lalala...