[support] upgrading to 5.8. One question.

the upgrade.txt that comes with 5.8 mentions the following: 4. Disable contributed modules and switch to a core theme (Bluemarine or Garland). I seem to recall I had problems way back around 5.3 doing this. I disabled CCK I think it was and tables such as content_type_XYZ in my db were eliminated, together with the content in them. Am I remembering correctly? So this is keeping me from disabling any contributed modules until I'm sure about this as I don't want to lose data. does this ring a bell with anyone? Neil