Last modified: 2014-02-12 23:47:29 UTC
In the experimental version of mobile editing, the new reply feature does not work. Instead of putting the inputted text in the discussion, pressing the blue button just gives you the exact same page you're on, except for the fact that the text box where you placed your text is now red. It doesn't do anything other than that.
Can you provide some steps to reproduce? The UI is not perfect but it sounds like you are hitting an error that's preventing a save from happening...
Please reopen with details of browser and reproduction steps if you are still seeing issues but this seems to work for me.