I completed my test run of your product and was very happy with what I saw so was showing a few people the iPad version. My wife asked me to fill out a webpage for her, but using fill with my identity did not work. I went to a PC (Chrome plug-in), and clicking on identity effortlessly supplied the data to the appropriate fields.
Going back and forth, it appears that I'm able to easily enter data by clicking on an identity while using a PC with your browser plug-in; however, when using the iPad version on the same site that works on the PC, it appears to be hit or miss.
While testing I have tried all 'User Agent' settings on the iPad for each tested site.
Any thoughts, suggestions, ideas?