This is good to know. I had been running 5.5 on two machines (now have 5.5 on one and 6.6 on the other) but I wasn't sure if it was specifically allowed or not.
BenQ DW800a with dual format firmware (8-4-12 +, 4-2.4-12 -, 24-10-40 CD) (in KHypermedia clothing)
TDK VeloCD 5201 52-24-48 USB 2.0 external
BenQ 5232W 52-32-52
LG GCE-8381B 48-24-48
Yamaha 8824E 8-8-24
Ricoh 6201S 2-2-6 SCSI