I have 2 sticks of 1066 RDRAM and have had no problems with it at all. Now, I haven't overclocked it at all but currently I'm not having any problems with it. I think it's just like anything else, bad batches happen and the company gets a negative mark for awhile. I've read reviews where people weren't having problems and some that were.
I have a 512mb stick of OCZ pc2700 rev 3.2. Memory timings are excellent, CAS2, 2-2-5-2 1t timings, running it on a msi max2-fir 845pe chipset board. I've never had one problem with this, but people have complained in the past that there were problems. They seem to have turned things around with their new DDR memory.