kernel^W linux upgrade via apt

[Daniel Robitaille]

> This is confusing to many people (including myself) because the version
> names on the kernel-image packages include ubuntu, but synaptic doesn't
> mark them as supported by ubuntu (the ubuntu icon doesn't precede them),
> but the linux-image packages don't have ubuntu in their version names
> but they do have the ubuntu icon.  What is the reason behind this
> apparent inconsistency?

linux-image-xxx is part of "main", thus is free and has the icon. 
linux-xxx is part of restricted, thus doesn't get the icon in synaptic
(but is still supported by Ubuntu's developers).    I would have
assumed that restricted would have also got the icon in synaptic until
I actually check it out last night.