I'd like to write one blog post about some changes that are a bit more "important" or have the potential to break some systems. Here's a summary that should be included in the blog post:

• Apply default filter_limit to all API calls #10009 Apply default filter_limit to all API calls
• Extract the first IP from HTTP_X_FORWARDED_FOR and HTTP_CLIENT_IP and HTTP_CF_CONNECTING_IP and HTTP_X_FORWARDED_HOST when there is more than one IP #10404 Extract the first IP from HTTP_X_FORWARDED_FOR and HTTP_CLIENT_IP and HTTP_CF_CONNECTING_IP and HTTP_X_FORWARDED_HOST when there is more than one IP
• we had to drop support for IE 9, Better UI for Piwik 3, more responsive, faster, lots of other fixes  #10397 (comment)
• big db schema changes