On Sep 26, 5:01 pm, "Sergio Correia" <sergio.corr... at gmail.com> wrote: > > I'm using IDLE 1.2.1, Python 2.5.1, and Tk 8.4. Does anyone has any > idea of why is this happening? > Two mainloops == bad. IDLE == 1 mainloop. your program == 1 mainloop.