Cutting/Pasting Issue in Captivate

Have you ever noticed that *sometimes*, when you attempt to copy an object and paste it using keyboard shortcuts (or the right click short cut menu options) - that Captivate can't seem to remember to clear the copy/paste buffer from the last copy/paste?  "Sometimes" it will fail to empty the paste buffer in memory.  The only way to empty it is to save the project, close captivate, and re-open it.  Anyone else experience this or have any remedies?