Finally happened. I made the switch to Fedora. I’d been a Kubuntu user since 2006, but since the switch to Pulse Audio I have had serious problems with sound under Kubuntu in 10.10, 11.04, and 11.10 beta. I have no such trouble with Fedora 15.
I’ll likely be moving all systems I manage over from Debian GNU/Linux to Fedora or CentOS in the coming months. (I realize Ubuntu isn’t exactly Debian. I only ran the former on my laptop, not servers, but I prefer to standardize on a single distribution and it looks like Red Hat derived distributions is where it’s at for me.)