Hi, and first of all I want to thank you for your extension. It`s really awesome!
And to my problem.
I`ve installed K2 2.5.7 to my joomla site 2.5.6 on localhost with K2 Store. It was working nice, but soon I`ve decided to remove K2 store (need something more) As soon as I removed K2store my K2 items and categories became invisible at admin page. But they are published in phpMyadmin! All new items I create are shown in myadmin too, but not on admin page. Reinstall doesn`t help. By the way, all categories are shown in drop-down menu, but I can`t work with them. Thanks for reading. It would be great if you could help me.

Hi. Try to clean your browser's cache. Also try to install the K2 SVN version.

It was first things that I did. I also tried Opera, Safari, IE, Firefox

Did you try the SVN version? Also look at the database and check the language field of items and categories. It should not be empty.

Thanks a lot. There where no language selected, but there is one little problem. When I publish/change my item or category, I need to put the language option in my database. How can I configure that to set up automatically my language in database?

The problem is solved. So my steps:
In database prefix_template_styles I`ve changed language to my own and after that installed todays SVN pack.
Before I changed language in _template_styles, I also tried to install SVN pack, but this didn`t help. Thanks a lot and best wishes! K2 is really awesome!

You are welcome.