While some local Northeast Ohio residential markets are experiencing strong demand and price increases, the overall market still has signs of weakness.  The S&P/Case-Shiller released August 30, 2011 (indices through June 2011), seasonally adjusted price index slipped for the fifth straight month.  The seasonally adjusted index is at the lowest level since November 1999 slipping 0.3% from May 2011.  Non-Seasonally adjusted index climbed a little over 1.5% in June, signalling the summer selling season.