I have been noticing that several plugins / themes have been being updated quite frequently lately.  Some of the plugins I have, but for some odd reason are not auto-updating in my admin panel.  What I ended up having to do was manually updating them.  Once I did that, I noticed that, for example, one of the plugins I updated didn't have any updated code in it.  It simply had a new folder in the "update" folder and the file within it just had this:

<?php

And that was it....So needless-to-say, are these plugins actually updating or are they simply showing that they still exist in the store?  And if that's the case, are they supposed to auto-update in the admin area on our sites?  Because if so, I am not receiving the auto-updates anymore in my admin panel...  Or did they only make it where it is updated in the store on here?