Version:           unspecified (using KDE 4.5.3) 
OS:                Linux

When dragging a window around, it snaps not only to the panel itself, but also to some other line about 15 pixels above the panel.

Reproducible: Always

Steps to Reproduce:
Drag a window near to the panel.

Actual Results:  
It snaps to some horizontal line 10-15 pixels above the panel.

Expected Results:  
It should not snap as there is no window there.

If I disable the window snapping, this effect is gone.
Attached screenshot shows two windows above the panel, one snapped directly to it, one to that other line.
I had this effect with KDE 4.5.1 as well, but not in the 4.4 series.