Wrong mobile UI for Windows Phone 7.5
 

Browser detecting for Windows Phone 7.5 doesn't seem to work when the browser is set to prefer "Mobile version."

I noticed that if I change the browser to prefer the "Desktop version" of m.fuelly.com, then I get the "rich" experience. If I use "Mobile version," I get the basic text version. Is there an issue detecting the WP 7.5 phones when in "Mobile version" mode?

Also, I noticed that if I login from the "rich" experience, I end up on a page that simply says "undefined" after clicking "Login." This happens on both my iPhone 3GS running iOS 5.1.1 and on my Lumia 900 running WP7 7.10.8112.7. The Windows Phone emulator can also repro the issue.

We use jQuery Mobile to power Fuelly Mobile and it's possible there's a detection problem there somewhere. Is there an issue with just using the Desktop setting?

Not sure what's up with the login. I can't duplicate it on an iPhone, it seems to be working fine there. Are you sure you have your 3GS set to accept cookies?