was having some serious problems playing back svcd movies (either no video or flipped picture or constant freezing) and neither of the solutions i came across in this forum seemed to resolve my problem.

now everything is working properly (i'm running xp and my friend, with similar problems, is running 2000, and it worked for him as well). maybe this rather simple solution might help others as well:

-uninstall every video codec (xvid, divx, codec packs...)
-install Elecard MPEG 2 Player
-reinstall all the codecs you have just uninstalled
-enjoy your svcd movies

cheers,