Like others I have a major problem since the 1.2 upgrade, the stats for my 58 sites were decreased by about 66%…
I have Piwik 1.2 hosted on a server at the address stats.exemple.com and 57 sites hosted on an other server at addresses sub1.exemple.com, sub2.exemple.com, …, sub57.exemple.com. I have also differents domains (www.exemple2.com, othersub.exemple.com, etc) on the idsite 58.
Piwik works fine since october 2010 and my database is about 7Go (5Go before 1.2 update !). We use OpenX as adserver and it doesn’t shown any visitor decrease.
Thanks for your help