They've dicked around with the packages in their distro and now you can't just type:

# apt-get update && apt-get dist-upgrade

...and expect it to work, like I did for seven consecutive releases of Ubuntu. (I renamed the old sources.list every time. I archived the system before switching, and here's what I've got:

01/04/2006 09:41 266 sources.list.save
26/10/2006 19:56 544 sources.list.dapper
04/11/2006 09:38 715 sources.list.edgy
09/12/2007 09:58 726 sources.list.feisty
23/05/2008 12:17 720 sources.list.gutsy
25/06/2008 18:51 708 sources.list~
21/11/2008 15:19 273 sources.list.hardy
29/04/2009 20:23 282 sources.list.intrepid
29/04/2009 20:24 276 sources.list