I was playing the White Star Diamond Adventure 1st stage when a kobold blocked my attack (the jerk) but the card stayed on the scree constantly making it difficult to see or click anywhere. Update: It disapeared after the round ended
Search for "Jarring Block," and you find this has been a lasting issue: http://www.cardhunter.com/forum/threads/jarring-block-gets-stuck-have-you-seen-this.2851
