Bootup messages pass by so fleetingly that, for some, one might not be sure what they say. You may wish to check all the files where they might be logged into, in addition to the usual (well-known) log files, for verification purposes (at least).
On Debian, logs generally are kept in directory /var/log.
To do this, you may have to enable boot-time logging. For color information, see here.
After booting, what changed there today (which files) can be seen in the Bash shell by:
sudo ls -ld --sort=time `sudo find /var/log -type f -daystart -ctime 0 | sed -r 's/^.*\.([0-9]+|old|gz)$//g'`
The scrolling output may contain interesting strings like 'will be removed'. Here's how to find them:
sudo grep -ilF 'will be removed' `sudo find /var/log -type f -daystart -ctime 0 | sed -r 's/^.*\.([0-9]+|old|gz)$//g' | sort` > log-list; sudo nano `cat log-list`
Boot-time logging can be enabled by:
apt-get install bootlogd
and edit /etc/default/bootlogd to contain
BOOTLOGD_ENABLE=yes
Unfortunately, bootlogd seems unavailable on squeeze.
For color information, see here.