On Fri, 23 Aug 2013 02:25:52 GMT, det wrote:

..and win7-32, win xp.

1)
when the dialog is on, and you touch/move a file or use the right mouse button, gtk emits a lot of
Gdk-CRITICAL **: gdkdevicegetsource: assertion `GDKI
S_DEVICE (device)' failed

related: can drag&drop within the file browser and the right mouse button menu be disabled?

I'll take an look at whats causing this.

2)
the ctr needs:
Window parent Transient parent of the dialog, or NULL

however, it does not work with null, it will result in a
object.Error: Access Violation
(see code below)

This is a bug, fixed in:
https://github.com/gtkd-developers/GtkD/commit/2160e97503bf3a61619cadf6e8b1d31b1ba04c3f

the situation / signature seems to be similar for MessageDialog, which, however, works fine with null as parent.

/det

... code ...