[Gambas-user] Dialog.Path problem using gb.gui

[M0E Lnx]

I'm using gb.gui for my project. After upgrading to RC1, I noticed
this weird problem.
When I set the dialog path I get this ugly annoying message in the console.

(new:9550): Gtk-CRITICAL **: gtk_file_folder_unix_get_info: assertion
`strcmp (dirname, folder_unix->filename) == 0' failed

My code looks something like this

Button1_Click()
Dialog.path = "/tmp"
if dialog.openfile() then return
Textbox1.text = dialog.path
END

This message does not occur if I set the dialog.path to user.home but
it does if I set it to anything else.

Any ideas how to get around this? I really dont want to use gb.qt or
gb.gtk... I want gb.gui
Is this a known bug?