Strange river dashboard behavior of blogpost

Hi there

When a blogpost is written it's shown in the river with a strange behaviour. Ir prints: 

#blog_details-230').toggle();return false;" class="river_item_toggle_details" href="">Details anzeigen/verbergen

instead of 

"Details anzeigen/verbergen" (show/hide details)

 

Any hints why this isn't printed propperly?