Web Browser support message - What the?

I was paying some license/registration bills online today and came across this strange browser support message.

 

"...Please Note: Some customers using browsers other than Mozilla Firefox or Internet Explorer (versions 4 or more) have reported experiencing problems with online payments. To help us improve our systems, if use a browser other than Mozilla Firefox or Internet Explorer..."

 

What the...?? Thats word for word too including the grammar errors. Surely they cant be serious in not supporting the worlds two leading web browsers right? :) Obviously a proof reading failure...