Eclipse's splash screen isn't recognized as such, so it gets resized to fill the frame which looks really odd.
Eclipse could but does not set _NET_WM_WINDOW_TYPE_SPLASH, because apparently metacity puts them always-on-top:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=83667
https://bugs.eclipse.org/bugs/show_bug.cgi?id=79944
Anonymous
eclipse actually first shows up 'normally', but then after asking the user which workspace to open resizes/tiles itself.
Looking with xprop, the window is first:
WM_NORMAL_HINTS(WM_SIZE_HINTS):
program specified location: 0, 0
program specified minimum size: 455 by 295
window gravity: NorthWest
but later gains an icon and resets itself to:
WM_NORMAL_HINTS(WM_SIZE_HINTS):
program specified minimum size: 1918 by 1057
window gravity: NorthWest