I got my hands on the firmware version 00.01.02 from some shady source and I performed the following test:
Starting with F/W version 00.01.14, push vendor.bin, upgrade to F/W version 00.01.02,self-cal.
Result: DC offset on channel 3.
Starting with F/W version 00.01.00, push vendor.bin, upgrade to F/W version 00.01.02,self-cal.
Result: No obvious offset on all channels, similar to the hack performed on F/W version 00.01.14 before.
Since Rigol hasn't officially announced F/W version 00.01.02 and because of the shady nature of the source I got it, I think it would be better not to spread the F/W for now.
Just FYI.
Let me know if you want to see some tests on this F/W. I have a Siglent 2142X AWG on my bench.