I had two issues, one during the upgrade process, the second with proprietary wireless network drivers. I upgraded a 3-years old HP laptop from Windows XP. My initial plan was to make it boot both systems, but the install hang up during repartition, destroying Windows. Oh, well, isn't that what Linux is for, to destroy Windows? The second problem was just an annoying non-issue, solved by finding the right aptitude incantations.<p>Apart from that, Karmic has been a cute little boy all along.