Description of problem: It has been a long time since the last official update of librsync. However, in the librsync community, it's a well known fact that the latest official librsync needs a small patch to be able to handle large files: https://sourceforge.net/tracker/download.php?group_id=56125&atid=479441&file_id=169866&aid=1439412 See also: https://sourceforge.net/tracker/index.php?func=detail&aid=1439412&group_id=56125&atid=479441
Thanks for the report; this is fixed in librsync-0.9.7-6, which should appear tomorrow at the repositories.