Hi all, an interesting finding to share with you.
If you follow the readme file in the latest 02.03 firmware Rigol released quickly after 02.02, probably there is little to no reason for doing another upgrade for most users. However, I found the 02.03 update fixes a couple issues that are not documented in the readme file:
1. At least in my case, it fixes the problem with Auto randomly turning on channel that have nothing attached. I have seen channel 2 (rarely), and channel 3 (almost always) turning on and display traces of noise. Self-cal does not help, but after applying the fix, the problem is gone. I have not been able to recreate it, when I press Auto, channels without input no longer comes on.
2. As sb42 had shared, when you press Auto, you sometimes get an intermediate image of other channels flashing on the screen for a moment, before it settles on the final screen. This problem is also gone, there is no momentary flashing of random channels.
These are important fixes for the new bug introduced in 02.02, but unfortunately in Rigol fashion, the fix documentation did not fully describe what it fixes.
I hope you will find this tip useful, and perhaps more owners can test it out so we have more than a sample of 1.
And a big thank you for mabl for pointing out the change in the FPGA and appEntry, his effort prompted me to test out the 02.03 firmware even though Rigol did not mention these hidden fixes.
Good luck and stay healthy.