The CD they sent me a while back had v 1.24 printed on its face, but internally the software was identified as 1.22A. My correspondent said it was final.
I compared it to the firmware posted above: all files identical.
Don't know what it changed besides the splash screen: mine now says Integra, rather than Onkyo.
Even with a Samsung BD-UP5000 in the same rack, we use the DV-SP1000 for audio and SD DVDs.