In the eclipse-platform package: /usr/share/icons/hicolor/32x32/apps/eclipse.png Is a symlink to ../../../../eclipse/plugins/org.eclipse.platform_3.2.1/eclipse32.gif This *may* happen to work with the GNOME menus, but: A) It's not legitimate to give something a .png extension that is actually a gif B) The icon spec doesn't allow GIFs... icons must be PNG, XPM, or SVG (http://freedesktop.org/wiki/Standards/icon-theme-spec)
Thanks for pointing this out. I'm working on an update for fc6 this week and I'll include a fix for this. I'll also try to get them to use pngs upstream but I suspect I won't get any traction.
This is fixed in the upcoming 3.2.2-1.fc6 update. Thanks.