Yeah there are fixes. Mine is to copy my ringtones and notification .ogg to the media folders in the Root directory /system/media/Ringtones (something like that). I usually do this to the Infusion ROM zip on my PC before I burn the ROM onto phone.
I know there are other ways.
Can I ask how you converted to .ogg format? I tried an online convertor to change a .mp3 to .ogg and copied this to the \system\media\ringtones folder. Although it showed up in the list of ringtones (after a reboot), it wouldn't actually play it, it was just silent if I selected it.