The plugin is awesome and I use it on a lot of projects! I just updated to version 0.8.4 and saw that the links to Piwik and WP-Piwik in the Dasboard Widget aren't there any longer. On the piwik site in WordPress also the Piwik link (to the Piwik installation) is missing.
Don't know what that is but it's the same on all sites now with v. 0.8.4
Thanx for any help!