Version:           3.5.1 (using KDE 4.6.5) 
OS:                Linux

If you play kpatience in a maximized screen. If you click and drag but miss a card. It minimizes and drags the entire window.

Reproducible: Always

Steps to Reproduce:
Maximize the window. Start a game and click in the window that's not on a playing card. 

Incidentally to make it as annoying as possible have the pre-maximized window size very small.

Actual Results:  
It drags the entire window and unmaximizes the window.

Expected Results:  
Should do nothing at all.

The applicable workaround is to work in a unmaximized window that is essentially as large as the maximized window. Then when you drag it's less rage inducing. 

Also it's making my accuracy better.