North America and US IP addresses do not appear to be working properly; I have almost no US traffic being reported whereas before the update it was 70% of my traffic. The stats for IPs also seem low, I'm not so sure this section is working very well and identifying countries as well as it was in the previous version. (I have 6x the traffic from Trinidad and Tobago than the US according to my current stats!)
One thing to check if you get no stats - if you already had a cron job #14, the insert for this cron would have failed and you'd never get a stats update. I would suggest putting a NULL in place of the 14 as cron's cronid field is an auto increment and you do not need to specify the cron job number.
Code:
INSERT INTO cron
VALUES ( NULL, 1136665500, -1, -1, -1, 'a:1:{i:0;i:25;}', './includes/cron/psistats_update.php', 1, 'psiStats 2006 Hourly Update' )