Windows Not Minimizing

Hi! i have the "minimize to dock" checked and it minimizes the apps like firefox or WMP. but when i for example, open a folder and minimize it , it doesn't minimize to dock.

I have the taskbar hide so i cant reach the explorer windows.

I only can reach it by pressing alt + tab.

I have the lateste nightly build.

Can someone help me?

I have Windows 7 64 bits.

#540093