It's free signup day at MSN AdCenter, but you better fire up that ol IE browser you keep around for CSS compatibility testing, because they don't take Firefox:

MSN adCenter does not currently support the web browser you are using. Please sign in using Internet Explorer 6. More about system requirements

Earth to MSFT, Earth to MSFT: You are not the market leader here, you are not the monopoly. You have to try harder...

PS, MSFT: Correct punctuation is appreciated even in user-unfriendly error messages. A period please after "system requirements".

UPDATE: Well, it sucks once you register as well. I'm trying to add keywords to my Campaign, and it's not working because it's getting JavaScript error messages. Help is broken in places too. If any one from MSN reads this, here's ONE of the JS errors: Home.aspx, Line 686: Error while parsing: "https://adcenter.msn.com/XSLSheets/EditableGrid_Rows.xsl". No data is available for the requested resource.

I think I want my $5 back.

¶ 3/06/2006