Sadly google yesterday “started” rolling out it’s switch to https, the ssl search which does not pass the keyword data from the search results to your server.
Over 120% increase in Keyword (not provided) from my UK traffic
See this blog from yesterday http://www.seroundtable.com/google-ssl-worldwide-14836.html
Anyway … Here are the stats to show off the massive impact on UK Traffic keyword reporting:
As you can see the massive spike in the (not provided) keyword in my stats. This site 100% targets the UK market and has around 80% uk traffic.