gtkfileselector opens a directory rather than storing the changes

I'm using Ubuntu 8.04 - the Hardy Heron with the blubuntu theme, but this applies to all gnome desktops I've tried recently.

When saving a file (see attached screen shot for an example), and 'browse for other folders' is selected, the window shows a row of buttons indicating the folder hierarchy, so that could be 'home' 'user' 'downloads' 'graphics'. Suppose the last file I saved was in 'home' 'user' 'downloads' 'graphics', but this time I want to save in 'home' 'user' 'downloads'. I would expect to click on the 'downloads' button, and then the 'save' button (given that the name of the file is shown in the 'Name:' field.

What actually happens when you click 'save' is that it opens the sub-directory which is still highlighted. I want to save in the current directory, but there is no (obvious) way of de-selecting the currently directory (see screen shot for an example of when clicking 'save' doesn't save the file).

thanks for looking at this,
Jon