Looks like template modification was applied twice. Go to admin control panel -> styles -> template modifications, check counter for "navigation - Add menu button" template modification. If it is applied more than once, click Rebuild Templates button.
How does this handle Adsense? Currently we have a separate mobile theme so its not an issue but we'd need some way to control whether to display full or mobile ads.
Are you experiencing same issue when you aren't logged in? I don't see that issue on your forum, so my guess is it is ether caused by menu that appears only to registered users or by moderator bar.
I disabled my 8thos Bar modification and removed everything from EXTRA.css out of curiosity and nothing has changed. Which probably means it's either my parent theme that's messed up or it's another modification interfering.
Inspect elements of moderator bar in desktop mode, see which one has white-space:nowrap and add rule for it with white-space:normal to responsive_extra.css
Or just this rule to responsive_extra.css and hope it matches item that's causing problem:
Code:
#moderatorBar, #moderatorBar div { white-space: normal !important; }
Even though disabling DC Smiley Manager fixes the postbit width, TinyMCE is still very very small, so that's telling me that there's something else going on.