vista leaves behind folders when moving folders with files in them

Hello,

this never happened before in XP..

Now in vista.. when

I move a folder from location A to B,

sometimes an empty folder is left behind in location A

all of the contents of course are sent to location B...

Why is this empty folder in location A not removed?

I have to delete it manually...

This doesnt happen ALWAYS, only some times...

Thank you all for your replies.

-Love is a great teacher....