First, let me say that I really like WP-Piwik! I'm using WP-Piwik v0.8.8 (with Piwik v1.5.1) in WordPress v3.2.1.
When clicking on a link (any link) within the WordPress admin pages, sometimes I am thrown back to my home page (http://example.com/). This may also happen when browsing the public site (link ends up on home page instead of proper destination).
This started happening after installing WP-Piwik, but I have not yet proven what causes this failure. The behavior is intermittent (maybe once per day). This can break form submission (because the form is never submitted to the proper page, and changes are lost).
Has anyone else seen this happen? Can anyone help me diagnose whether this is WP-Piwik (or Piwik itself), or some other plugin? Many thanks for any assistance!