When i play an DivX 5.02 movie (or xvid) on my hdd my player uses about 20-22 mb of system memory, then i close the movie and opens one similar DivX 5.02 from my server over my 100 Mb Lan just to discover that the player now uses the double amount, 40-44 mb.

Is this normal or should i start tearing something apart...?
Seems quite mutch to me...