Created attachment 574248 [details]
shadows on desktop after akregator minimization
Description of problem:
Oxygen window decoration shadows remains after windows minimizing in tray if desktop effects enabled.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. open some not maximized windows (for example konsole and akregator)
2. minimize akregator using tary icon
shadows remains on desktop
No problem when desktop effects disabled or when other decorations used (for example qtcurve).
It looks like to be fixed by reverting https://projects.kde.org/projects/kde/kde-workspace/repository/revisions/0f3380f3b10e57416f81a1288dc10b8dfe11d87e
But, looking at the diff and review, another change might be missing somewhere else (padding in oxygen ?).
Bug fixed after updating to kde-workspace-4.8.2-2.fc16.