keep in mind people generally only post when they have issues/problems/complaints and that shows a very skewed picture. i agree that "if it ain't broke, don't fix it" but Plextor definitely knows something is awry (that us end user may not know or experience) and consequently they would release a newer/revised firmware to deal with any issues/compatibility/etc.
good to know you have an external enclosure with a chipset that works fine with the 708A :)...i've read about some problems people have had with external enclosures and their corresponding chipsets not being compatible.
MCC003 (Verbatim 8X DVD+R - Taiwan),
YUDEN000 T02 (Fujifilm 8X DVD+R - Japan),
RICOHJPNR01 (TDK 4X DVD+R @ 8X - Japan/Taiwan),
CMC MAG E01 (TDK 8X DVD+R - Taiwan),
Mitsubishi Chem Type 3 (Verbatim 52X CD-R - Taiwan),
CMC MAG Type 6 (Memorex 52X CD-R - Taiwan),
Taiyo Yuden Type 1 (Memorex 12X CD-R - Japan),
Ritek Type 7 (Maxell 40X CD-R - Taiwan?)
Ricoh Type 6 (Ricoh Platinum ?X CD-R - Japan?)
and a host of other media types with no probs. and no probs reading discs burned with older FW versions either.