The latest changes to the Mobile Web code is making the "Read This Post In Our App!" Nag banner un-dismissable. You cannot x it out. The grey banner only appears on questions, not on main page or asking a question or search.
On the other end, it's also not clickable, so it won't load the link to the play store copy of the Stack app. Double fault.
Using Chromium/Stock browser on Android 4.4 Samsung S4.