Confermo, succede la stessa cosa e se lancio da terminale, ottengo:
$ gambas3
(gambas3:145850): Gtk-WARNING **: 10:30:32.758: Negative content width -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.758: Negative content height -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-CRITICAL **: 10:30:32.758: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScale
(gambas3:145850): Gtk-WARNING **: 10:30:32.758: Negative content height -2 (allocation 0, extents 1x1) while allocating gadget (node trough, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.758: Negative content width -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-CRITICAL **: 10:30:32.759: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScale
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -2 (allocation 0, extents 1x1) while allocating gadget (node trough, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content width -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-CRITICAL **: 10:30:32.759: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScale
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -2 (allocation 0, extents 1x1) while allocating gadget (node trough, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content width -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -16 (allocation 8, extents 12x12) while allocating gadget (node scale, owner GtkScale)
(gambas3:145850): Gtk-CRITICAL **: 10:30:32.759: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GtkScale
(gambas3:145850): Gtk-WARNING **: 10:30:32.759: Negative content height -2 (allocation 0, extents 1x1) while allocating gadget (node trough, owner GtkScale)
ScrollArea.ScrollArea_Arrange.457: #29: Invalid object
ScrollArea.ScrollArea_Arrange.457 ScrollArea.Border_Write.688 ^TextEditor._new.266 MPrint.Run.21 FEditor.mnuPrint_Click.3946
Dovresti riferire sul bugtracker, magari alletgando anche questo...
:ciao: