I installed Piwik, the web stats tracking program, on one of my domains using Dreamhost's one-click install. Then, I installed and activated the Piwik plug-in on each of my WordPress sites.
All of my WP websites show up on my Piwik dashboard, but no data is being shown for any of them.
According to a Piwik discussion page I found, this problem may happen if a host uses mod_security. The only recommended solution is to have the host turn off mod_security. I know we are able to do that in Dreamhost ourselves by turning off "Extra Security" for a given website. However, with all the problems I've had with hackers, I want all the security I can get on my sites.
Anyway, I don't know for sure that mod_security is causing my problem. It seems odd that Dreamhost would offer Piwik as a one-click install if mod_security interferes with it -- at least without providing a warning about this.
I have read that problems caused by mod_security can be overcome on a per-file basis with a line of code in one's .htaccess file. But I don't know what that code would be.
Any ideas? Has anyone else used Pikwik and had the problem that it didn't actually pull any data from the sites it was supposed to be tracking? Do you think this really does stem from Dreamhost's use of mod_security?