Gnome 2.6: File types have no associated icon

[Jesse Zbikowski <jesse mind be>]

Hi,

I recently upgraded my Debian testing/unstable system from Gnome 2.4
to 2.6.  It works great, except now the "mimetypes" icons for various
filetypes aren't displayed in Nautilus or on the desktop.  I do have
the desktop icons which are set explicitly in a .desktop file.  My
application and menu icons look fine; I tried a few different icon
sets.  I can Select a Custom Icon for anything, and if I go to

desktop preferences -> advanced -> file types and programs

I can specify an icon for any MIME type (directory, text files, etc).
BUT by default all the types are set to "No icon".  The document
mimetype is reported correctly when I look at its properties in
Nautilus, e.g. "Tar archive (Bzip2-compressed)".  It just looks like a
blank piece of paper instead of a type-appropriate icon.

I selected my theme using the Theme Preferences window, and tried
installing a new icon set from art.gnome.org under Theme Details
(Icons).  I have installed the latest unstable versions of

gnome-icon-theme
gnome-themes-extras

I also tried putting all my mimetypes icons (e.g. gnome-mime-text-x-c.png)
into /usr/share/pixmaps/document-icons (as somebody once suggested)
but this did not help.

I read there was a problem with an old libgnomeui which did not use
absolute pathnames for icons, but I have libgnomeui-2.so.0.600.1 which
I think has the fix.

If you can think of anything else I should try or look at I'd really
appreciate it.

Thanks,
Jesse Z.