The icon name in qtcreator.desktop doesn't match up with the actual icon installed. /usr/share/applications/qtcreator.desktop: Icon=qtcreator Installed icons: /usr/share/icons/hicolor/128x128/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/16x16/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/24x24/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/256x256/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/32x32/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/48x48/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/512x512/apps/QtProject-qtcreator.png /usr/share/icons/hicolor/64x64/apps/QtProject-qtcreator.png See the screenshot where it fails to load the correct icon and uses the fallback one instead: http://kalev.fedorapeople.org/missing-qtcreator-icon.png
*** This bug has been marked as a duplicate of bug 987857 ***