Rockbox in general is on a very stable level and don't expect mayor changings.
But fur us, the more interesting thing is the port to DX50 and which bugs have been fixed.
Here you can see all commits of our port:
only the commits of Ilia Sergachev are interesting.
He is still fixing things but there are also no mayor changings between 03-25 and 06-30 build as far as I know. But the 06-30 update is for 1.5.0 Firmware and the 03-25 version for 1.2.8.
Edited by cholero - 7/3/14 at 10:56pm