org.apache.xerces.impl.io.MalformedByteSequenceException : Invalid byte 2 of 3-byte UTF-8 sequence.

	at org.ametys.cms.contenttype.MetadataManager._saxRichTextMetadata(MetadataManager.java:940)
	at org.ametys.cms.contenttype.MetadataManager._saxMetadata(MetadataManager.java:300)
	at org.ametys.cms.contenttype.MetadataManager._saxMetadataSetElementOrAll(MetadataManager.java:199)
	at org.ametys.cms.contenttype.MetadataManager._saxMetadataSetElementOrAll(MetadataManager.java:206)
	at org.ametys.cms.contenttype.MetadataManager.saxMetadata(MetadataManager.java:156)
	at org.ametys.cms.content.ContentGenerator._saxMetadata(ContentGenerator.java:348)
	at org.ametys.cms.content.ContentGenerator._saxContent(ContentGenerator.java:161)
	at org.ametys.cms.content.ContentGenerator._generateContent(ContentGenerator.java:113)
	at org.ametys.cms.content.ContentGenerator.generate(ContentGenerator.java:97)
	at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:581)
	... 50 more
Caused by: org.apache.xerces.impl.io.MalformedByteSequenceException: Invalid byte 2 of 3-byte UTF-8 sequence.
	at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
	... 79 more
Caused by: org.apache.xerces.impl.io.MalformedByteSequenceException: Invalid byte 2 of 3-byte UTF-8 sequence.
	at org.apache.xerces.impl.io.UTF8Reader.invalidByte(Unknown Source)
	at org.apache.xerces.impl.io.UTF8Reader.read(Unknown Source)
	at org.apache.xerces.impl.XMLEntityScanner.load(Unknown Source)
	at org.apache.xerces.impl.XMLEntityScanner.scanContent(Unknown Source)
	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanContent(Unknown Source)
	... 76 more

<content>
            <metadata>
                <title><value>Mon premier contenu XML</value></title>
                <abstract><value>Résumé de mon premier contenu XML.
Deuxième ligne.</value></abstract>
                <illustration>
                    <image><value>http://www.anyware-services.com/skins/Anyware-Services/resources/js/mobileswitch.js</value></image>
                    <alt-text><value>Texte alternatif de l'illustration</value></alt-text>
                </illustration>
                <content>
                    <docbook:article version="5.0">
                        <docbook:section>
                            <docbook:title>Titre du contenu</docbook:title>
                            <docbook:para>Texte riche.</docbook:para>
                            <docbook:para>Deuxième ligne.</docbook:para>
                        </docbook:section>
                    </docbook:article>
                </content>
                <attachments>
                    <entry>
                        <attachment><value>BINARY</value></attachment>
                        <attachment-text><value>Mon premier fichier joint.</value></attachment-text>
                        <attachment-desc>
                            <docbook:article version="5.0">
                                <docbook:para>Texte riche.</docbook:para>
                                <docbook:para>Deuxième ligne.</docbook:para>
                            </docbook:article>
                        </attachment-desc>
                    </entry>
                    <entry>
                        <attachment><value>BINARY</value></attachment>
                        <attachment-text><value>Mon second fichier joint.</value></attachment-text>
                        <attachment-desc>
                            <docbook:article version="5.0">
                                <docbook:para>Texte riche.</docbook:para>
                                <docbook:para>Deuxième ligne.</docbook:para>
                            </docbook:article>
                        </attachment-desc>
                    </entry>
                </attachments>
            </metadata>
        </content>