Something seems very weird.  Every upgrade tutorial tells you to upgrade to the latest version of iRedAPD, iRedAdmin, Roundcube... but when you're upgrade multiple releases, aren't you then creating a situation where you've got the latest of everything but with only a part of the changes in the database and config files?

The tutorial says you have to go a version at a time, but every version upgrade tutorial tells you to go to the latest of everything.  To me it does seem like you'll either get a lot of errors while getting through all the separate upgrades until you're finished... or the server will just create irreparable issues during the process.

I need to upgrade 8 versions now which will probably take me quite a few hours, but I would have preferred to just do one or 2 versions today, a couple the next day and so on until I'm at the latest.  Is that even an option?