Created attachment 64687 [details]
screenshot that describes both the bug and screen arrangment

Version:           unspecified (using KDE 4.7.2) 
OS:                Linux

When I set my two monitors relative position to the natural way they are arranged on the desktop using this command:

xrandr  --output DVI-I-1 --mode 1280x1024 --pos 0x0 \
        --output LVDS-1  --mode 1280x800  --pos 1280x380 --primary

Then when I maximize windows on primary screen (laptop screen, LVDS-1) they fill up the whole screen and top panel shows on top of the window.

I attach screenshots of xrandr configuration and laptop screen to illustrate that better.

Reproducible: Always

Steps to Reproduce:
1. Connect external monitor and get its xrandr name.

2. export EXTERNAL=<name of the external output>
   export INTERNAL=<name of the internal output>

3. Find out resolution of external monitor
   export POS=<horisonal resolution of external monitor>x<500>

4. xrandr  --output $EXTERNAL --auto --pos 0x0 \
        --output $INTERNAL  --auto  --pos $POS --primary

5. Ensure you have a top panel on internal output
5. Maximize a window on internal output

Actual Results:  
Window title is covered by the top panel.

Expected Results:  
Window is maximized and its title is right below the top panel

I use two panels on the primary monitor, bottom panel KDE style, top panel with launchers.