Kostya,
This behaviour is not on the Smart Folder, which I do not use.
After seeing your screencopy I better understand what happens.
I use a tablet in portrait mode, and the message list has room for 4 icons plus the menu icon.
With one mail selected the 4 icons are:
Delete, Mark Read/Mark Unread, Star/Unstar, Move to...
With two mails selected (of unequal Read status) the 4 icons are:
Delete, Mark Unread, Mark Read, Star.
With two mails selected there is no longer an icon for Move to.... but that action is available after pressing the Menu icon.
So it is still there, just not as accessible. I can definitely live with that. Thanks for the screencopy.
Andre