Determining which config files I have modified?

[Adam Funk]

On 2007-08-06, Felipe Figueiredo wrote:

> On Monday 06 August 2007 06:54:30 Adam Funk wrote:
>> Is there any semi-automatic way to determine which config files
>> (especially in /etc/) on my system I have modified from the packaged
>> versions?
>
> maybe you could use a IDS like tripwire?

I already use aide, but I don't keep the old reports or databases
indefinitely (my current aide.db reflects my customizations up to last
night, for example).

I was hoping for some sort of apt-based trick to go through packages
comparing checksums in the packages with those of the files on disk.