Printing fails because LC_PAPER is ignored

Print defaults to US Letter, which usually results in failed printing in countries using A4 paper. It also ignores LC_MEASUREMENT, showing inches instead of cm.

To reproduce:
1) Set up A4 paper and metric system (using export or /etc/environment)
LC_PAPER="fi_FI.UTF-8" # a4, can't print without this
LC_MEASUREMENT="fi_FI.UTF-8" # metric system
Detailed howto in http://myy.helia.fi/~karte/english_in_finland_on_ubuntu.html
2) Start Firefox
3) File:Print:Print (being in a country that uses A4 paper)

What happens: Printing fails, because Firefox defaults printing to US Letter, that probably can't be bought in most countries. Many printers fail to print the file, and require a button to be pushed on printer for any future print jobs to be accepted.

What should happen: It should use A4 paper size, printing should work. Metric system of measurement should be used.

Bypass:
- To be able to print, use File:Print:Properties:Paper Size to set A4 manually.
- It seems that there is no way to get metric units to print properties dialog.

Tested with
- Firefox 1.5.dfsg+1.5.0.1-1ubuntu10 on Dapper Flight 6
- 1.0.7-0ubuntu20 on Breezy
- If I remember correctly, same problem exists on Debian Sarge too.