Created attachment 758142 [details]
Site Redirects And Import/Export portlet doesn't show any Sites or Spaces.
When I want to add this portlet in some page, sometimes it goes well, but sometimes I get Unknown Error, or I can't save it at all, so I can't reproduce it correctly. Also saving the page with this portlet on it is sometimes quite slow.
The problem with IE10 rendering seems to be problem in the lab. There was a "IE10 compat" mode set in developer toolbar instead of "IE10". With "IE10" mode the page renders OK.
We need to have a look on the problem with adding the portlet on another page.