Besides all the actual bugs in Sonar (read: things not working as intended), you have quite a staggering amount of combinations of hardware/software AND people who may not know what they are doing in terms of computers and software in the Windows environment. One of the smart things about Apple is that they exert control over what is produced from the hardware side, thus greatly reducing one side of the equation ...but Apple users pay premium for it.
Which is why when you see people with the cheapest parts on a pc along with drivers that might totally wrench a system, you see more "random" bugs and strange behavior in a Windows environment. But even Apple has bugs with all of their controls!
Add to that people not actually knowing what the hell they are doing in a studio making assertions or accusations about how things *should* be, and you get some of these threads on the board.
I've worked in IT for years in software houses. Software has never been perfect, and it will never be perfect. I KNOW Cake cares and does their best, but I also KNOW they are a small shop. That isn't to say I haven't been disappointed a few times, but Sonar works for me and I have faith in them.