"Lockable" stickies on the dashboard?
I'd like to introduce you to a different approach. I had a similar problem (not the copy/paste error, but that the notes were not really too cool to work with). 

This was a long time ago, but since I switched to the free Notational Velocity, I haven't had issues, with the benefit of a very fast (instant) indexing and search in all the trash I want to save :)

Give it a look, it's open source and very simple to operate. It may give your Stickies approach some fresh air and you might like it :p