Hi i have found that when trying to log in to my site using the iOS app if i have the plugin enabled then the blog returns invalid. If the plugin is disabled then all works fine. I can access the site that the plugin redirects to fine through the app so i don't think the issue is with another plugin installed on that site.
I have read other suggestions that say that this may be to with the text formatting - http://ios.forums.wordpress.org/topic/blog-returned-invalid-data
any thoughts?
Sim.
http://wordpress.org/extend/plugins/mobileesp-for-wordpress/
