IPhone :: Not All Ringtones Transfer After IOS 5

Previously, I've used Audacity to edit a song in my iTunes library for use as a ringtone. I'd open the .mp3 or whatever file it was, copy out the bit of the wave that I wanted for a ringtone, save the file as a .m4a and then rename that file to a .m4r for importing as a ringtone in iTunes. I've never had an issue with this process until iOS 5.

Since updating, not all of the ringtones I've created sync to my iPhone 4. I've tried recreating several of them and sometimes that works and sometimes it doesn't. of the 43 ringtones I see in my iTunes library, only 26 actually sync. I checked to make sure that iTunes is set to sync all ringtones for my device and tried recreating some of them. I noticed that even ringtones that I didn't create myself are not syncing, as the free ringtone for "Want You Gone" off the Portal 2 OST from Valve will not transfer!

Info:iPhone 4, iOS 5.1