flickering error when making textbox - osx lion

[sloev]

when making a textbox in osx lion and kivy i run into an error which is best described as flickering just under the textfield. in the left menu.

it works ok but the flickering is really annoying. heres a vid link: http://www.youtube.com/watch?v=m8VKyA0o4nI&feature=youtube_gdata_player