On 03/30/2011 12:24 AM, Mattias Gaertner wrote: > >> Is it safe to use DebugLn from thread other than main? > No. > (Me again, but I could not resist: ) I suppose It would be very easy to make a thread save version of DebugLn if TApplication.QueueAsyncCall would be fixed in GTK (and all other WidgetTypes) -Michael