Hi,
The problem with Facebook is that it has cached the data for the URL sometime in the past when the link was probably not working correctly. You need to tell Facebook to refresh the cache.
You can use the Facebook debugger for this:
developers.facebook.com/tools/debug
Just enter the URL and click the Debug button - it will refresh the cache and display the current information about the link. I've already used it for
www.top-solar-info.de/politik/news/polit...enderfinanzausgleich so that link already works correctly in Facebook.
I don't know what causes the Bing and Google problem, maybe it just takes some time for them to index your website. Have you supplied the sitemap.xml file for them?
Your website seems to return correct HTML response codes, so I don't see a reason why it shouldn't be indexed. Are there any errors reported in Google Webmasters Tools?