Enlightenment's ( e16 style, live preview ) pager doesn't honour a window's opacity when rendering. It would be cool if it did :) But it's minor I guess.
- Enable E's Pager module ( ie not Pager Plain )
- Open a window
- Set a very low opacity ( ie make the window almost completely transparent )
- Look at the desktop preview in the pager
The pager will show the window rendered at a fixed opacity ( which appears to be something like 95% maybe? )