I have a G4 Powermac running 10.4.11 and have Quicktime, VLC, Movist, Elmedia, Macromedia and Real Player, but many .wmv3 files (not .wmv1, they're OK) won't play, they just freeze. Same with many FLVs and quite often .mp4 files, even some .avi files too. I am beginning to think it's not my computer, which is not in the first flush of youth, but maybe my broadband source Plusnet. Could this be the case? If not any ideas please?