Although in slightly different vein and, strictly speaking, not reported to a public bug tracker, this AMD CPU bug report by Matt Dillon is probably my favourit

Although in slightly different vein and, strictly speaking, not reported to a public bug tracker, this AMD CPU bug report by Matt Dillon is probably my favourite (link: https://www.dragonflybsd.org/mailarchive/kernel/2012-03/msg00000.html https://www.dragonflybsd.org/mailarchive/kernel/2012-03/msg0...). Tracking the intermittent problem to the lowest level and blaming the CPU and not the numerous layers above it surely takes guts.