I am working on http://midwestbowie.com that is actually a subfolder using an addon domain name (http://froghead.net/MidWestBowie). I installed WordPress Mobile Pack and it immediately caused problems by forcing the number of posts shown on the home page to one (1). It then caused loss of communication with the database, refused to recognize my login and password, changed the WordPress location of my site to a different folder, and finally just blew up---forcing WordPress to deactivate it. I physically deleted all of its folders and files via FTP since it would not let me log in to deactivate it.
WordPress Mobile Pack required an update as soon as I activated it, so I assume that I am using the latest version (3/15/2013). I am currently using the Pinboard theme in conjunction with the WP Catalog plug-in. These were working smoothly with out problem for two weeks until I activated WordPress Mobile Pack.