I happen to know for a fact that it works fine on the 3G OS 3.0, but when I jailbroke my 3G, it literally crashed my iPhone. Thank god for mobilesubstrate and safe mode.
interesting. i wonder if it has anything to do with me installing/using tones from Cydia/Rock for use with Winterboard? do you all use these type tones with ToneFX? or does everyone create their own on the ToneFX.com website?
You may want to import the Cydia ringtones to your actual iTunes ringtone folder. I do this then delete the ringtones from Cydia afterward.