Believing the documentation a icecache is compressed with zlib. I tried multiple ways to decompress it but all give problems.
Here is a post on stackoverflow. http://stackoverflow.com/questions/17053145/unknown-compression-method-with-zlib?noredirect=1#comment24663064_17053145 Is it changed over time from zlib to gzip without updating the reference or something? would be nice if someone can help. best Doeke
