--- /dev/null
+I have an ikiwiki, where I activated the plug-in sidebar:
+* enable sidebar? yes
+* show sidebar page on all pages? yes
+
+In order to create the page, I add a link to it on my entrance page: \[[sidebar]].
+I now can choose where to put it, I put it as "sidebar", not index/sidebar. Language is Markdown, nothing else installed on the system.
+After saving I can create the page clicking on the "?" and I fill it with links and the plugin pagestats.
+The sidbar appears properly on all pages, also the tag-cloud.
+
+However, when I try to go into "preferences" I just get an error message, saying it has the format html: "Content-type: text/html "
+The entire html is
+\<html><head></head><body>Content-type: text/html</body></html>
+
+What is happening?