Clipboard files saved to desktop?

[andymac2210]

I've noticed recently that the odd thing I copy to the clipboard (is that the right name for things you cmd + C?) have been appearing on my desktop.

I don't know what keyboard combination i keep pressing to make this happen but it's happened 4 times now.
Sometimes it's images, today I found a rtf 'text clipping'.
Im sure im not dragging stuff to the desktop.

What the heck am i doing to make this happen?

I've only noticed it since installing Lion.

 

[andymac2210]

Is there any keyboard shortcut that's causing this?