Hmmm … and there I went and spoiled it. I need to shrink my main volume a bit so I can test Slackware 12.0, and then I need to muster some courage to actually reboot my Linode. It's been up and stable ever since the migration. :-)
I'm a little disappointed that I upgraded to 11.0 just a week before 12.0 came out, and then updated to 12.0 a week before I saw linode had a 12.0 image available.
At least I got forced to read the UPGRADE.txt file.