Q1 2012 (Version 2012.1.215)
Breaking change: Since the Beta release of Q1 2012 the nodes of the treeview have their text html encoded.
Reason: There were problems when using LoadOnDemand through WebService and ServerSideCallBack. When a node with html in the text was added a server error occurred upon postback.
Solution: From the upcoming Latest internal build the encoding will be optional through the property EnableNodeTextHtmlEncoding and it will be disabled by default.