Comment 21 for bug 262723

the key word in this line is dh_icons, if some package don 't use it but install an icon in the gnome directory it will be broken by the gtk change since gtk will not look out of the cache if there is a cache available and return that the icon is not installed which leads to issues , before turning that cache update for the gnome theme you have to make sure all applications do update the cache, we didn't do this work on jaunty and it would require somebody to check every package installing a gnome icon to see which one are broken and would need to be update for the change to work on jaunty