Ulf Dittmer pointed out to me in an email that the old Friki 2.0 allowed more than one consecutive capital letter at the start of each Wiki:WikiWord. Friki 2.1 sticks closer to the standard and only allows one. If you have a lot of old pages like this, or you just prefer this approach, here's Ulf's Friki tip on how to change the way WikiWords are recognized.
As usual, all this can be done without stopping or restarting the server or even the application.
Go to your Friki data directory (the one you entered when you first started Friki)
Edit the file wiki.transform
Change the line