Mavericks requires 64-bit version of XiphQT
XiphQT 0.1.9 has finally reached the end of its life. It is not functional in OS X 10.9, because Mavericks requires 64-bit apps, and 0.1.9 is 32-bit.
Any chance of getting a 64-bit version of the component? Without it, Safari 7 users have no way to play .ogg files at all.
If someone figures out a way, feel free to file a new ticket or reopen.