When using the keyboard shortcuts and the main window is already hiddden there is no need for the "redraw"-delay

First, shutter is great - customizable, and work its job.

But when I press F12 (which I set in Preferences->Behavior->Gnome-Keybinding to be key(combination) to trigger capture with selection, there is about 1 second delay.

I understand that nothing is instant, but to my knowledge this delay is "waaay" too big.
I don't know what is the reason for it, maybe my ubuntu PC configuration/Xconfig is somewhere something wrong, but I expect to wait when I'm starting the program, but when program is already running, it should react instantly.

To eliminate hardware as cause, PC I'm talking about gives following numbers to unix commands:
free - 4121044 (4GB)
dmesg | grep process - Detected 2393.990 MHz processor. - Total of 2 processors activated (9576.09 BogoMIPS).
top gives cpu usage between 3-4%.

Any idea would be great, shutter works, but this delay is a bit annoying if I want to take more then 2-3 shots.

Regards