In version 1.2 I switched the front-end menu customization to using a filter on wp_get_nav_menu_items
instead of my own custom Walker, which was interfering with other themes that used their own Walker, so make sure you are using version 1.2.
However, I am not familiar with WPTouch. I just downloaded it and it appears to create its own menu somehow, thereby bypassing wp_nav_menu()
, which is needed for my plugin to work.
That’s just my best guess though. I can’t promise 100% integration with every other plugin in the WordPress world. You might want to ask WPTouch how they are doing their menus and how operations that work on default WP menus (such as my filter) can be tweaked to work on their own menus.