Staff => Drag&drop <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
Seeing stone => put the mirror from Anbuklar in front of one location the stone shows (I always took the church). Then click on the stone again and watch - then report to the rebel.
Crystal man => I don't understand, this quest worked for me in version 1.42 and 1.44. Giving the poultice should result in finishing the quest, getting XP and the Marksman's cloak as reward <img src="/ubbthreads/images/graemlins/confused.gif" alt="" />
Ball => take out the "always run" option and move close to the ball, until it is grey, try drag&drop then.
As a rule <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" /> - if you can't pick up by clicking, use drag&dropping into your char's inventory or on one of the portrait icons.