Sorry for my bad english.
I found bug in work buffer bar on jplayer circle.
in circle.player.js on line 120
percent = 100 * bufferTime / self.audio.duration;
but, other case bufferTime > self.audio.duration and percent > 100!
bufferTime=77.32250213623047
self.audio.duration=77.3225
Then the last step function _progress not work, because else if (percent <= 100)
i fix this insert line below percent = 100 * bufferTime / self.audio.duration;
if(percent>100) percent=100;
test this bug:
http://test.voice-cards.tk/audio/test.htm
sample mp3-files: