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The broken part is the curly or smart double quotation marks [ ” ] in the dropnote open tag. Your text has fancy double quotes -- not a left-right pair, but two rights. However, the dropnote tag will not work unless the internet-style straight quotes [ " ] are used. No curly or smart quotes, even in properly matched pairs. Just the straight ones.
Replace those with internet-style straight double quotes by deleting the curly or smart ones that came from your text processing software and typing the straight ones from your keyboard into the item edit page.
In addition, please read the section titled Avoiding Problems with Quotation Marks and Apostrophes at the bottom of How To Upload Writing from Writing.Com 101 . This problem could re-occur with any wml tag that uses quotation marks for a marker.
Hope that helps.