wiki pages can no longer be edited when there are links to Wiki pages within a section heading

• log in as normal user (that doesn't have Admin rights for the Wiki)
• edit a page of your choice where you are using a link in a section heading; for example using this code (in syntax 2.0):

== from [[John Doe>>XWiki.doe]] ==

(where "doe" is a registered user)

• save & view your change
• edit the page again
• in the field "Choose editor" select "Wiki" instead of WYSIWYG

Result: you get the following error message:

content: Exception while parsing HTML

You can also no longer Save & View the page.