I recently upgraded to 1.7, but now no data is showing in the dashboard for any of my websites for the days after the upgrade (previous days pre-1.7 are showing fine) . I’ve checked the piwik_log_visit table and there are visits showing for the 1.7 days.
Thanks Matt, I was running automatic archival, however I was using the archive.sh script in the same directory. Changing the cron job to archive.php worked perfectly, thanks!