Google Reader import stopped working!?

Google Reader Shared Items import just stopped working a few hours ago. The entry in the "Automatische Imports" section is displayed with red background color and when I hover over it the tooltip says "undefined method `owner' for nil:NilClass".
Is this a problem you are aware of? Really just started a few hours ago, was still working this morning and ever before. Thanks.
By the way, the link to the feed is as follows... http://www.google.com/reader/public/a...