One of my laptops has Ubuntu 8.04 64bit and it works perfect. Then I went to Citibank's site to login for the first time,
http://citicards.com. At first, you get this:
You should get this, however, unless you can login within 2 seconds the page switches to this :

Naturally, User Agent Switcher, a firefox addon, came to mind and it works perfectly but I was just not satisfied. None of the other banks I use do this, even the small ones. According to
Citibank:

I called Citibank Technical Support and the person I spoke with said
"the Citibank website supports Firefox but does not support uncommon operating systems like Linux".I called again just to see if this was the official Citibank policy. This next person went into detail about how Windows is the only OS that offers
"real security".
At this point I was a little offended.
The next two people I spoke with had never heard of Linux (in technical support!) and put me on hold to ask the manager if I could view http://citicard.com with Linux. Of course they came back and said Citibank only supports
"secure operating systems" and that windows was the only option.
The Last person I spoke with at Citibank Technical Support had heard of Linux. She stated
"I have Ubuntu on my laptop, and I love it!". She also assured me, off the record, that this is Citibank's official policy and they do not care.
Personally, this pisses me off. WHY would you block customers that use Linux, especially when your site works fine with Linux?
This has clearly been an issue for over a year. This post is from Linuxquestions.org. In a post on movingtofreedom.org,
Citibank: You’re on Notice, the author goes into detail about his similar experience with Citibank and their unwillingness to do a thing about it.
Maybe this is nothing but if you feel like calling
Customer Support, use 800.852.7282, no waiting ::grin::.Here is a
video showing the problem. First I show that Citibank is using Solaris, via
Netcraft, and then I attempt to go to http://citicards.com. As you can see, the page goes blank. I then right click on the page, press play, continue, continue, and close. This workaround, brings the login page up correctly.