This is a minor bug release regarding just the recently-added sha512 support. Turns out the wrong initial buffer size was used on the R side. Hannes fixed that within hours after we got the bug report; but I was a little swamped with multiple deadlines and failed to upload this right away.
CRANberries provides the usual summary of changes to version 0.6.2. Our package is available via the R-Forge page leading to svn and tarball access, my digest page, the local directory here as well as via Debian and its mirrors.