That pentium 4 thing may have been around the same time.
Also triggers a memory of the intel compiler, at some time, compiled programs ran about 30% or so slower if it could not find the string "genuine intel" somewhere in the registers. It took quite some time before the benchmarkers figured out what was happening. Heck, just giving their competitors newest CPU some undeserved low benchmark results in the first month or two after release must be worth millions or billions.
... And that coprocessor calculation bug that gave wrong answers... On itself it should have been just an errata, but they tried to cover it up untill such an outrage was started in the media that they could not deny it any longer.