Andrea,
Strange.
1.
Do you have problems with this example included in the download package?
How did you extract the content from editor?
2.
Try set the following code to false:
Editor.EncodeHiddenValue Property
By default Cute Editor will encode the value in the Hidden field automatically. You can turn it off by setting this property to "false". If this property is set to false, ValidateRequest="false" in the page directive is required.
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx