Works fine here. With and without the favicon extension.

works fine here, too.

Could be bug in the favicon cache.

Vincent, can you try the following: first make a backup of ~/.gnome2/epiphany/ephy-favicon-cache.xml and ~/.gnome2/epiphany/favicon_cache/ and all its files. Then open the python console (from e-e), and type

> import epiphany
> epiphany.ephy_embed_shell_get_default().get_favicon_cache().clear()

Does it work after that? Or after that, and restarting ephy?

It works after doing this and restarting ephy.
Do you want me to attach the backuped files?

It'll be enough if you just post the sniplet from the .xml about the gnome.org favicon (from <node> to </node>) and whether the file in favicon_cache/ with the name of the <property id="3"> existed in there and was a valid image file.

the favicon was gone for me, too, after opening a second tab and then going to the gnome.org tab. reload changed nothing. 

is not reprocable, tough.

  <node id="37">
    <property id="2" value_type="gchararray">http://www.gnome.org/img/logo/foot-
16.png</property>
    <property id="3" value_type="gchararray">7b58f2fbbaaaedc1b8f00c8029eedfb4</p
roperty>
    <property id="4" value_type="gint">1173423461</property>
    <property id="6" value_type="gboolean">1</property>
    <property id="7" value_type="gint">60</property>
    <parent id="9"/>
  </node>

The file was not in favicon_cache/.

Vincent, is this still a problem?

Vincent: Ping.

I assume, that it's not and I'll close this bug as OBSOLETE. Feel free to revert this, if you don't think it's a smart move.