Bug 300642

I have two monitors which are physically positioned one above the other and have configured the desktop to extend across these two monitors using KDE System Settings. This configuration was then saved as default.
Every time I login, my desktop widgets are displaced to the right (see screenshot). If I move the panel on the right of the screen to the bottom, the widgets go back to their original position by themselves. After that, I can move the panel back to its original place and the widgets will remain in their right places.
However, after each login, I have to unlock widgets, drag the panel to the bottom, drag it back to the right and lock the widgets again.
Also, some windows which start maximized in the lower monitor are sized and positioned incorrectly (see screenshots). Again, if I move the panel on the right side of the screen to the bottom and then move it back to its original position, the window automatically resizes and repositions itself correctly.
These problems do not occur when the monitors are configured in clone mode.

Reproducible: Always

Steps to Reproduce:
1. Add some widgets to the desktop
2. Setup a panel on the right side of the screen
3. Use System Settings to configure a two monitors system in such a way that the desktop is extended across the two monitors, which are placed one above the other
4. Save this setup as default in System Settings
5. Save the desktop (K -> Exit -> Save session)
6. Logout and login again

Actual Results:  
Desktop widgets are displaced to the right.

Expected Results:  
Widgets should remain in the position they were originally placed and saved.