With today's technology, it's really hard to know who to point the finger at. Apple buys Pioneer drives and brands them "Superdrive", making them their own. Pioneer basically puts out PC firmware updates, there's barely a mention of 'mac' on their website. Apple won't write the firmware updates because they're Pioneer drives, neither will Pioneer because they're in Macs (the imac update being the (reluctant, I'm sure) exception).
When I bought this drive, there was nothing saying I could throw the DVR-103 in my mac, but I did, and it works --- only the diehard tweakers would admit that it would work. Apple says it has to be a Superdrive (an Apple branded Pioneer drive, and you could only burn 2x using Apple branded media), Pioneer makes small mention of Mac compatibility (you have to look really hard to find it) --- and definitely no mention of Mac support. So, they're both at fault, and they're both correct in what they're doing: they don't have to support (my case) because neither of them said it would work in the first place.
Anyway, I don't mean to rant....
My drive fits all the criteria of needing an update, it's a 103 and its revision number is less than 1.90. I really don't feel like sticking a 4x DVD-R in there to really test it out. Though I'm disappointed at both Apple and Pioneer for successfully sidestepping this issue (and it's a rare one, I admit). I have no other option but to pull this drive, take it to a (trusting) friend, and flash the new firmware on his machine and hope for the best. I guess that just comes with the territory of 'do it yourself computer upgrading'---(read: sidestepping paying Apple $800 for the same drive that I could get for $250). But it's all worth the $550 savings!