Mobile Joomla has stopped showing mobile site - what now?

Mobile Joomla has stopped showing the mobile site and after two hours of trying to reverse engineer the code, I thought I'd save some time by asking:  How do you debug this?  Is there a development setting I can enable?  Is there somewhere that I can check to ensure that the device is being properly detected?  

For what it's worth, I have confirmed that the mobile template works by adding "?device=iphone" to the URL and I successfully get the iPhone template.

We are running Joomla 1.5 and Mobile Joomla 1.1.1.  (Please note upgrading is not an option at the moment.)

Any help would be sincerely appreciated!

Alex

try making an htaccess file with this in it:

RewriteEngine on
#
# Rewrite to append "device=auto" query string to .html, .htm, .php, or index
# files at any directory level, unless that query string is already present
RewriteCond %{QUERY_STRING} !([^&]+&)*device=auto(&.*)?$
RewriteRule ^(([^/]/)*[^.]+\.(html?|php))?$ /$1?device=auto [QSA,L]

When you just enter the domain, it adds "/?device=auto" to the url and should serve your mobile template again.

ps: do so at your own risk! It worked for me with no ill effects to my joomla install, but who knows what it could do to another one.