On 15/01/2011 00:13, David Hare wrote:
> There are a few other steps before upgrading Lenny e.g. a later kernel
Don't forget to upgrade aptitude and dpkg before upgrading lenny to squeeze.
As far as I understand this is because some squeeze packages needs new 
features of squeeze's aptitude that lenny's one don't have. Quite 
logical, but still important!
N.