i'm not sure what icon you mention that jumps, maybe a screenshot of the problem happening could be more illustrative on this situation?
kde4 by default has very little eyecandy enabled(compared to e17 is fugly
), transparencies and that's it, 3d effects are disabled unless asked by the user, maybe you enabled it and don't like the results?
konqueror as file manager still exist on kde4 but dolphin feels more integrated to kde4
any specific problem with dolphin? lots of configs can be done, mostly what people do is add a folder panel with F7 key and places panel with F9 key
the preview panel that can make slow some machines can be closed and other options can be changed to make it work almost identical to konqueror