Are you behind a corporate firewall/proxy? I had similar errors on my machine because our company's proxy is slightly modifying HTML pages before they are delivered to clients - it extends links in these files by adding some strings...
When I was downloading files via "pkg install" or "pkg image-update" the proxy discovered that a couple of those files were gzip-compressed HTML pages so it modified and recompressed them before delivering them to my machine which discovered the modifications and complained about checksum errors. The only solution was to talk to one of our network guys who changed the proxy's behaviour to omit modifications when requesting something from pkg.opensolaris.org.... -- This message posted from opensolaris.org
