The problems is because of the panel size. The panel size you can set in the GUI is 25 minimum but when you set it manually in gconf-editor to 24 all icons are the right size.
I say all icons because the icon of my contact-applet suddenly changed to a bigger version, as did the terminal icon. I suggest to either fix the code that selects the different icon sizes or to make it possible to choose a panel size of 24px again. -- Mixer applet shows different icon in bottom panel than in top panel https://launchpad.net/bugs/57996 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs