The Tascam us2400 works fine on all versions including the new PT8
Sorry to say though, PT 8 has bugs and it is not ready to be used on client sessions.
But I have tested up to PT8 and still using 7.4 and Tascam 2400 works great...
Great Controller, the only thing is you may not be able to use surrond panner joystick on PT8, but who cares.
The Soft LCD software I cant run, PT is looking for USB port 6 when going in.
I will say if you have any issues with the 2400,
1. load the latest firmware and make sure you follow the directions.
2. set your HUI ports.... in PT
3. and if you have any communication issues or leds flashing.
try a different USB port and most of all use a Powered USB HUB..
Works Mint.
Enjoy!
Can't comment on MAC all windows tested.....