I'm trying to get a Perl/Tk script to monitor logfiles, I'm using Threads (and before you say it yes I know threads are experimental, but they are working for me), anyway, I'm using the HList widget to colorize and manage different lines from the logfiles based on whether they match a given pattern. I have the monitoring and pattern matching working. But when I go to add the line to the HList widget, it doesn't display until I move the mouse inside the application window. I've tried just about every combination of update(), after(), and repeat(). That I could come up with and nothing helps. This is going to be run on an unmanned box to display on a projection screen so moving the mouse over the application every now and then is not the fix. Any help would be greatly appreciated. I've looked everywhere I know to look, but to no avail. None of the cookie cutter answers seem to be applicable to this problem. TIA.