I wanted to add in here just a bit.
I've noticed the same problem using the same sequence of steps as davekelly
without adding the objects. I capture, go in to SC, add a drop shadow, Ctrl+C to copy
to the clipboard, then go out to an email or Excel, Ctrl+P to paste - - wide black border appears.
I know for fact that I was doing this same procedure before, perhaps this latest update,
to capture then paste directly in emails and the shadow appeared just as expected.
Also, if I use the Thumbnail command, it puts a border and drop shadow around the
image and pastes in to outside app/email just fine - - except that the resolution of
the image gets fuzzy for some reason.
Not sure if it's related, but about two weeks ago I activated SC and all of my
Preference settings were reset somehow. It was a mess and still haven't gotten
everything back to the way it was since I didn't track my settings.
My screenshots seem to have a poorer resolution when creating a Thumbnail
and I'm not sure what is going on with that.
Thanks and looking forward to the fix on the Drop Shadow.