The last week of April Google hit one of my sites. I had optimized it for a new keyword phrase. Happily, I got the number one slot for the new phrase. I say the traffic double from 250 uniques a day to 500 + uniques a day. Today I noticed a severe drop off in traffic. After searching the new phrase in Google I noticed I was nowhere to be found. After searching for the primary phrase I found myself and saw that Google had reverted to the previous cache from a month before! Has anyone else had this happend? What on earth is going on?