So I've been reading this thread for some time now, and I didn't think to chime in until now.
I did have the problem with the individual ringtone after the OTA update, but that didn't bother me. I downloaded the fix (that got pulled) and it's fixed...
But here's the problem I've been having that doesn't seem to be mentioned much: I have a bunch of custom mp3's in a Ringtones and Notifications folder on my SD-card... but the phone won't recognize those folders and put them in my ringtones or notifications list when in settings or trying to set notifications in different apps (like Handcent or Gmail).
What's the deal? I swear that it was working this way before the OTA. Did the OTA break that, too?
I did fix that somewhat by finally rooting the phone (whereby I could copy all of these custom mp3's to the /system/media/audio/ subfolders... but not all of the notifications are being recognized EVEN THOUGH they're in the right SYSTEM folder.
???