Are you using only one <location-chooser> on the device or are you using multiple choosers?
The location chooser should appear as the following on an iPhone (when manually entering the location):

How does this differ from what you or your customer is seeing?
I am only using 1 location-chooser. We are seeing the entry box extending all the way to the right and covering up about 3/4 of the button on the right.
This is the same for me when I am looking at it with the User Agent changed on my FireFox.
When we put in the location (it will find the location by the way) it just goes back to the same page. I have noticed that it is not passing
the lat/long or even city/state. The only thing it passes is the __lc_origin which is not the same for the other phone types.