DVD is available now
I have been looking for this film for many years and only recently, in March 2011, a clean copy of it, along with English subtitles, has been released by the DEFA Film Library. It could be ordered from them at this link:
http://www.defafilmlibrary.com/product_info.php?products_id=140&osCsid=66jvhsednmuc2caa3e15k2e3r5