Same issue here. Upgrading from 3.0.2 to 3.0.5 and no stats... But they definitely collecting.
No issues with plugins, no issues with maintenance. On stats pages I can see all campaigns names, websites and zones names, but no stats. I can see the data in ox_data_bkt_m and ox_data_bkt_c tables, I can see the data in Global History Data plugin.
This is not an issue with lib/RV.php, I already try full path to PEAR.php, relative path, RV_PATH . '/lib/pear/PEAR.php', not helping at all.
This is not an plugins issue – reinstalled them all from scratch again, no luck.
Any ideas/suggestions?