How to tell what has changed after an update?

[Patrick Doyle]

On Mon, Dec 7, 2009 at 9:39 PM, Amber Graner <akgraner at gmail.com> wrote:
> On Mon, Dec 7, 2009 at 9:31 PM, Patrick Doyle <wpdster at gmail.com> wrote:
>>
>> How can I tell what has changed after an update?  I presume (never
>
> you should be able to go to packages.ubuntu.com and find the package you are
> looking for  by release by version and there should be a link that says
> changelog  iirc  Hope this helps
>

That's not quite what I was looking for... That lists the packages in
karmic-updates, it doesn't tell me what I've installed on my
particular machine, nor when I installed them.  I think that there
should be some log associated with apt or dpkg that will tell me that
sort of thing, but I'm not sure where to look, nor, once I've found
what has changed, how to get more details than what's in the
changelog.

--wpd