I've never had a problem with a Debian in-place upgrade; I've got servers that have been upgraded from woody through to squeeze without a hitch. Where I've had

I've never had a problem with a Debian in-place upgrade; I've got servers that have been upgraded from woody through to squeeze without a hitch. Where I've had problems with Ubuntu, it's been around the desktop, and udev/hotplug integration. That being said, I've not given it a fair try for a few releases, so it's possible that in-place upgrades are better tested now, but I don't see the point of taking the risk. If it goes wrong, I'll end up reimaging anyway, so why waste the time?