My first diary post. In thinking about Hafner's slump, I had a dim recollection that VMart went through something similar in 2005. So I checked the data. Here it is [month, average, doubles, HRs):

April  .207 4 2
May    .213 3 2
June   .295 6 5
July   .323 6 4
Aug    .402 5 5
Sept   .352 9 2

So, a 2 month outage from a very good hitter (followed by a strong rebound) is not that unusual.