libplist fails to convert string nodes with xml entities

The binary/xml conversion fails for the example below due to no xml entity conversion:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Some String with Entities</key>
    <string>hello world &amp; others</string>
</dict>
</plist>

According to the NSPropertyListSerialization class documentation string nodes in XML format do the following:

"In XML format, the string is simply stored in UTF8 format as the content of a string element, and the only character escapes required are those used by XML such as the '<' markup representing a '<' character."

Fix: Converting the above plist to binary and the result back to xml must be consistent.