Here is a problem I found on Windows 7 64 Home Premium that was recreated on a different machine with Windows 7 64 Professional. I found it while examining, cleaning and reformatting an old external USB drive. I open a directory, say named 123, and start inspecting a subdirectory for files I might want to keep. Let's name this particular subdirectory ABC. I have opened the subdirectory and looked at the files and have determined I want to delete the entire directory and not just the files in the directory. To save time I figure on deleting the entire directory in File Explorer right hand window in one shot so I click on the parent, 123, in the left pane. I notice that the focus is still on the ABC directory on the right hand pane (pain). I decide to proceed by pressing Shift-Delete to trash the entire ABC subdirectory. Good enough?
Notice that BOTH the 123 parent directory in the left pane AND the ABC subdirectory in the right hand pane have the focus and if you indeed Shift-Delete the dialog box asks if you want to permanently delete the parent 123 directory? AND ALL it's subdirectories. I have given you clear warning and I only lost old trash I probably didn't want anyway before learning the lesson.
If you happen to click on the 123 parent in the location bar the only focus will be on the ABC subdirectory and allay the chance of major wipeout. I suspect MS would call this a feature but as for myself and a friend, who tested the prerelease, call this a serious bug to safety.