Plesk 8.2; Debian 4; Broken packages

Tried to install Plesk 8.2 onto a fresh Debian 4 install and got this irritating message from the installer that was downloaded from the Plesk website:

N) Next page; P) Go back; Q) Cancel installing;
A) Select all; D) Deselect all;
To select or deselect a component, enter its number;
Type a number or a character of desired action [N]:
Exchanging information with licensing server.
Checking whether the package dependencies are resolved.
E: Broken packages
ERROR: Unable to install packages because of package dependency problems.
Not all packages were installed.
Please, contact product technical support.

I checked out the log in /tmp/ and didn't really get that much more help apart from chat about circular unmet dependancies.

Thankfully found a helpful post that suggested adding a line to the /etc/apt/sources.list:

deb http://autoinstall.plesk.com/debian/PSA_8.2.0 etch all

And then doing an

apt-get update
apt-get upgrade
apt-get install psa

Then going back to the autoinstaller and adding everything else... worked like a dream.