Tom,
There are at least three very cool improvements in the new operating system which is called 3.1A.
The first is for loading patterns into the internal memory. Before, you could only load to the next available location but with 3.1A you can load to any place you want. Also, you can delete patterns from the load page.
Second, there is now a global reverb and a right hand reverb. I think from what I've heard others say, this is a way to keep your right hand reverb seperate from the song reverb. In the past they both shared and musicians complained about having to use the Reverb the song wanted. This was not always a good choice for playing along with a song.
The third improvement is if you were using 3.0a USA software, you lost the jump feature while playing styles, and now it's back!
I don't know what other new features are here, but it's worth a download.
(The middle Eastern features are not included here, but Sandro in Italy just emailed me last week and said the middle eastern styles and sounds are almost ready! That's good news for many players)