You might be having them for a while, looking at the other threads with these, the guys who have problems that cleared up all seem to have a subtle difference, they are running a drive which is ever so slightly a different revision. I think they have the BDR-206MBK, (mine's a BDR-206D). I don't know how much difference the suffix makes but maybe..........?
As for me i've been trying to beat this issue too wondering about one two methods right now;
1). Firmware upgrade for the drive, I'm running V1.04, Pioneer have V1.05 as current.
2). During power up the Mac does something that initialises the drive or whatever. I'm using Console.App and looking at the verbose to figure out what, maybe somebody more clever than me can do it?
Oh, it's not Toast - I don't have it.