Hello ,
I am using K2 component I have almost created site. But there is some problem with editing and posting new articles in frontend popup window . This window has doubled toolbars , buttons , textfields and so on . You can see on screenshots .But in admin panel everything is normal . :(
I would be greatful for help . Maybe someone know how to solve this problem .

Hi. Check your page for javascript errors. Also, in case you have made overrides to the itemform.php, ensure that you have not messed up the code.

I have the exact same problem. Besides i've never touched the itemform.php or any javascript files, i've changed all itemform.php files to standard without luck. Which JS files need to be checked?

Found the solution:
I was loading an external jQuery lib in the settings. Changed it back and everything worked fine then.