I also use FF 3.5 and I have NONE of the problems you stated ! I think it might be from the Flash Player you have installed, try updating that.
Good Luck !
B.
I am putting a DEADLINE on BOTH QUESTS !
One week AFTER the Lorerootian Festival ends , both quests will END (day 347 19:00 server time!)
Maybe some time pressure may motivate you more !!
Good Luck everybody !