I'm back for a bit and my org still has 6.2 running. I'm planning to upgrade them to 6.8 along with the Slaves module to fix their 1K (closer to 3K) roster issues.

Any known gotchas in the 6.2 > 6.3 > 6.4 > 6.5 > 6.6 > 6.7 > 6.8 jump?

I'll get the DB backed up and such before doing it, but hoping it is meant to be a smooth transition rather than needing to fix permissions, DB structure, etc. We have permissions tuned pretty well now and we share DB prefix on some bots ... so upgrading -could- be a nightmare depending on how much changed with the guts of the bot.