Wrong usize despite my best efforts!

[Filipe Bonjour <bonjour ime unicamp br>]

Hi,

I've got problem setting the size of my application (one of my firsts
with Gnome, so please bear with me!). It looks for a preference
"geometry=<width>x<height>" in !/.gnome/<myapp> throuhg the command

gnome_config_get_string("geometry=800x500");

Now, if I call the program for the first time it opens OK with the right
size, 800x500. Then suppose I resize the window. Then, when it quits, it
saves the geometry at that point, say 1000x800.

Now, I remove the file ~/.gnome/<myapp> and restart the app. But instead
of the default 800x500 as the first time, it still opens with the
"modified" geometry, 1000x800.

I know everything goes OK, because when I debug the program it reads the
default geometry, creates the GnomeApp widget and calls
gtk_window_set_usize with the right parameters (800, 500) -- still when
the window shows up it's 1000x800.

I guess Gnome (or Sawmill) remembered the state of the program as it had
last quit and butted in. Is that it? How can I tell it not to do that?
I'm not using GnomeClients or anything supposed to communicate with the
session manager (or so I think).

Thanks in advance,

Fil