Forgot to say that I have tried it with stock RedHat 9.0 (GNOME 2.2.0.1) with Mono/GtkSharp 0.25 or this morning Mono/GtkSharp CVS trunk. Thanks, Aleksey > I run into some problems with using RowActivated event > for TreeView. Basicaly, if I install *any* RowActivated event > callback then application crashes after 3-4 double clicks on > the tree.