Dee-27, no, I have not tried 1.0A. It's not worth my time to experiment and have even more downtime for this machine, though, so I likely just won't. If there was a changelog that addressed this bug, I would flash and try it, but until there is confirmation that this is actually an Optiarc bug and that this firmware actually fixes it, it's far cheaper (time-wise) and easier to just order drives that I know will work.
KTL, any addon controllers are not an option. As mentioned in my original post, I have 4 ODDs, and they are using the 4 IDE-capable ports on the board. They are not recognized in AHCI mode, and burning to (or accessing randomly from) more than one drive in RAID mode (which has ports 2 and 3 swapped from AHCI and IDE - bios bug?) immediately cuts throughput significantly. This is on an MCP78, or nForce 780a based system.
The reason add-on controllers aren't an option is for two reasons - one, aesthetics, as my case is about as cable- and clutter-free as one can get - the only cables you see are where they plug in and immediately hide away, and most of those are right-angle and/or unnoticable :). The second is that I physically have no place to plug in an add-on card. My hard drive setup is 4x1TB on an Areca ARC-1220 PCI-e RAID card, leaving all of the motherboard ports available for optical drives. With a big water loop, two videocards and a soundcard taking up the rest of the PCI-e slots, there is no way to physically access another PCI-e or PCI slot.
Also, KTL, running in channels 2 and 4 (or primary slave / secondary slave as viewed in BIOS in IDE mode) is the only combination that works with my Optiarcs without any lockups. If one is alone on primary, it'll usually work as well, but if both are on primary, IIRC, it locks up. If both drives are on the same IDE "channel" (ports 1&2, or ports 3&4), it'll always lock up when a burn commences. It doesn't matter if the Optiarc is sharing the "IDE" channel it with another drive either - as long as it is sharing it with another ODD, it will lock up. It will not lock up on reads, however...
Any other SATA drives I have used, work combined in any way, so as I stated, I am just going to go with some other drives. I also have no spare SATA HDDs to test out and see if they cause a crash when paired, so I can't see if it crashes with an HDD present as well or if it's only when paired with an ODD.