What a fool! Before reading your post i managed to go beyond mime cave.. i was focused om signposts i didn't notice that "wall"...! I hav another problem now: the complete run of skeleton dungeon (with secret chamber) awarded me 9/10 jackets.. i cannot find last one even if i am sure i did all the rooms. Could it have been that i was overburden while fighting last skeletons? Thank you very much fir the support!