Hmm, that works...eventually. It doesn't have the equivilent of my $$$this->update on each call to WRITE, so no output shows up until the whole thing is done.

The tie ability is not mentioned in the Tk::Text or Tk::ROText docs. Where is that discussed? Maybe there's information there about configuring it, too.

—John Update: I found the PRINT method in Tk::Text.pm and added a call $w->update;. That did the trick. There is no configuration ability in that code.