Since I’ve upgraded to Version 3.0.0. The Menu items are missing.
First I did a one-click update. After that I did a manual upgrade, cause I’ve thought not every thing is upgraded properly. But the Icons are still not showing.
Menu on the left is not so problematic but, top navigation and graph icons.
We had the same issue on Piwik 3.0.1. I’ve looked in the network traffic of my browser. There was an 404 error when the browser tries to get the piwik.woff - font. On our IIS the mime type setting for .woff - fonts were missing. After adding this type the icons appear.