Hi, I use Ubuntu 8.04[u804], and Ubuntu 804 based UE 1.9[u804ue19], and Ubuntu 8.10 based UE 2.0[u810ue20], in all 3 distro, youtube video plays well in firefox with flash 10 no problem at all but in Ubuntu 8.04 and Ubuntu 804 based UE 1.9, most recently downloaded flv flash video files don't play.....