Hello,
If you are a using a Lexmark printer. DON'T UPGRADE THE FIRMWARE.
You won't be able to use non-eom cartridge.
Once you accept the update, there is no going back.
FUCK YOU LEXMARK.
I'm going out to buy a new printer.
More info:
http://blog.clickinks.com/2011/01/le...ont-do-it.html