ARGH!!
I think I found it though:
1) Ctrl`
2) Click on an account
3) Click 'Account Settings'
4) Don't do anything, just click okay [Edit!] Actually, I'm finding that you can do just about anything after opening this
as long as you click 'Okay' and not 'Cancel'5) Close PM
6) Open, and Voila, the character set is switched
Also, when my folder gets the character set, it only appears if you choose to show Characters in the menu (use that symbol at the right). For some reason, if you click on the folder, and then on 'Account Settings', it wont let you choose okay because you have to have at least 2 characters.
Please tell me if its not doing that for you. It may be my computer, which has
happened before.I've tested this on PM 0.6.1 beta4. Trying it out now with other versions on a new profile.
[Edit!]I've found this on 0.6.1 betas 2-4 on a brand, spankin-new profile.
[Edit! again]Scratch that, it does NOT seem to show up on a new profile. It only shows if you upgrade from 0.6 to betas2-4.