Thank you much for the help, I really appreciate such quick support. I'll disable the stickies shadows as well and keep an eye on others. Much thanks for teh great software as well. =)

http://www.zhornsoftware.co.uk/stickies/index.html

After the app is started, all seems fine until you switch desktops and go back; then moving one of the notes leaves the shadow behind. Closing the sticky app doesn't make them go away, only closing Dexpot makes them go away.