Comment 4 for bug 900796

Ok i have the exact same problem and i know why.

Recently, the open file dialog in gnome changed a bit, now, by defaut, when you want to add a file, the recently used category is showed in the open filedialog.

It's an issue because we want to retrieve the last used directory when we open a file, and if we pick the file from the recently used files, then the last used directory is not set, producing an error the next time you wan't to add a file.