7.1 beta, Ubuntu 11.04 / GNOME, JDK 7. The icon for Services > Servers > GlassFish Server 3.x has an opaque white background, which looks bad when selected. Should use 0x00 alpha channel for the background.
There are much more important things to do in 7.4 now. Maybe I can try icon from abandoned cloud module (Java EE 7 feature that was dropped). Think it was transparent and it's almost the same.