Created Unassigned: HtmlEditorExtender adding & when typing < or > [27942]

It seems the HtmlEditorExtender is adding a '&' when users enter '<' or '>':
* '>' ==> '&>'
* '<' ==> '&<'

Thanks for your help.

Configuration:
* IE 10
* VS2013
* .Net 4.5
* Web site with web forms