Comment 44 for bug 75324

The GtkFileChooserDialog is resizing itself after being shown. This is the root problem, which causes positioning issues even when the dialog is not too small. This is a GTK bug, there are several rough patches proposed upstream, and the commit that introduced the problem is identified. Now, Compiz may raise problems by refusing to resize the dialog immediately after it's been shown - this may be a nice behavior to avoid window instability, or it may sheerly be a bug.

I don't understand what do you mean about Jaunty and a Compiz update. This will surely get into Intrepid if a nice patch is provided, and yes, a debdiff will help. The fix in Compiz won't come since the bug we reported to them was about another issue and was already released in Hardy.