Newbie questions - Frames

["Aubury, Mike" <Mike Aubury astrazeneca com>]

Hi, I'm new to GTK, but have run into a few problems - I'll post them one by
one to save my confusion

GtkFrame 

I'm using a GtkFixed container to house a few GtkFrames (this is a
requirement - I have to use co-ordinate placing).

When the frames overlap - they don't draw the borders I expect (using any of
the styles I've tried)

(Ascii art - set font to courier!) 

Using a couple of  frames for an example

This is what I'd expect :

Frame 2 on top
+---------+
| 1       |
|   +--------+
|   | 2      |
+---|        |
    +--------+



 Frame 1 on top

+---------+
| 1       |
|         |--+
|         |  |
+---------+  |
    +--------+


This is what appears when frame 2 is on top
+---------+
| 1       |
|         +--+
|     2      |
+---+        |
    +--------+

And when frame 1 is on top
+---------+
| 1       |
|         +--+
|            |
+---+        |
    +--------+



Is there anyway of correcting this ?