We were trying to copy some charts as pictures or images from one Excel workbook to another but Excel would not paste a chart as an image. One workaround was to paste the chart in a drawing tool, then copy and paste that image into the workbook. While this workaround was OK, it was rather cumbersome since there were many charts to copy. With a little bit of searching, I found that this was #9 in the Top 10 Excel Annoyances. To copy a chart as a picture, select the chart, hold down the Shift key, then select Copy Picture in the Edit menu (not available in the context menu).
Another Excel quirk I've just noticed but don't have time to chase down is why I get the Paste Special menu item after copying a chart while my colleague does not.