Hi
In k2 item please in right column "Metadata Information" can you add Description and check it?
Problem because k2 item page have added coding tag meta description wrong
Ex: (can you using addons firebug of firefox and check it)
<meta content=" Schulhöfe waren immer auch Kampfarenen, aber in jüngster Zeit wird der Ton härter. "Mobbing ist brutaler geworden", sagt Wolfgang Kindler, Gymnasiall..." name="description">
Or can you send me joomla administrator via contact form? So i can check it
Best regards
Bach Pham