Full screen zoom problem

[cicciobello]

Thumbnail browser -> [Enter] -> Full screen view (fit to screen)
Right mouse click: Lock zoom
[Esc] -> Return to thumbnail browser
Close XNViewMP
Restart XNViewMP
Thumbnail browser -> [Enter] -> Full screen view: image zoom is always set to 100% and lock zoom is deactivate

Why zoom leven can't mantain previous value? Is this a bug?

MS Win 7/64, XNViewMP 0.68/64