You can clone with
HTTPS or Subversion.
Selecting multiple rows in a date range evolution graph and trying to export raises a "bad date range error" .. manually swapping last date and first date into the URL does not work too ..
Attached the screen shots
Keywords: evolution, export, range
Forgot to specify I'm in the "Referrers-> Campaign" section
This was fixed in 2.0 beta http://forum.piwik.org/read.php?2,106854,106854#msg-106854