I think I upgraded from 1.0rc3 or rc4? to 1.3 final after the smf 2.0 upgrade.
And yes I had a back up, but unfortunately I didn't back up the /theme/default/portamx/blockcss/ folder as I don't use the default theme and i forgot that I added a customblock.mpt that would of needed to be backed up.
Its water under the bridge at this point, and I didn't mean to get on your (Do not Like list), I just wish that I didn't have to worry about the installer dropping tables, or deleting folders that may contain important data. Something has happened on my last three PMX updates that has made me spend hours fixing files or the database.
Anyway nuff said about it all.