I guess it’s safe to say the bone groups have been replaced by keying sets. With keying sets you can group bone together into channels that can be expanded and collapsed as needed. Within keying sets, you can create additional groups. Say you are working on a character, you could create a keying set for all bones in the character. Then as you assign bones to the keying set, you can group them together. You could create a group called ‘fk arms’ for instance and assign all the fk arm bones to that group. Then in the dopesheet, you’d see a channel called ‘fk arms’ and expanding that channel would allow you to see the keys for each bone’s value that you added to the keying set. Here’s an example:
It’s not the same as bone groups in 2.49, but once you get used to keying sets, they are nice to work with. See the link in my post above for more info…
Randy