All transition.to is leaving a image trail, please see pic in the link bellow, from the this code:
local box = display.newRect( 0, 0, 150, 50 )
box.strokeWidth = 3
box:setFillColor( 0.5 )
box:setStrokeColor( 1, 0, 0 )
box.x = centerX
box.y = centerY
transition.to(box, {time=1000, alpha = 1, x = 0, y = 0})
https://www.dropbox.com/s/yirh3633qivhnfr/Capture.PNG?dl=0
Why is that happening, did anything change on transition.to?