And CoreLogic has another take, courtesy of Calculated Risk

Thanks, Calculated Risk, for this:

CoreLogic: Home Price Index increased 0.7% between March and April

by CalculatedRisk on 6/01/2011 01:55:00 PM

Notes: Case-Shiller is the most followed house price index, but CoreLogic is used by the Federal Reserve and is followed by many analysts. The CoreLogic HPI is a three month weighted average of February, March, and April (April weighted the most) and is not seasonally adjusted (NSA).

From CoreLogic: CoreLogic® Home Price Index Shows First Month-over-Month Increase since mid-2010

CoreLogic ... today released its April Home Price Index (HPI) which shows that home prices in the U.S. increased on a month-to-month basis by 0.7 percent between March and April, 2011, the first such increase since the home-buyer tax credit expired in mid-2010. However, national home prices, including distressed sales, declined by 7.5 percent in April 2011 compared to April 2010 after declining by 6.8 per cent in March 2011 compared to March 2010. Excluding distressed sales, year-over-year prices declined by 0.5 percent in April 2011 compared to April 2010.
...
"While the economic recovery is still fragile and one data point is not a trend, the month-over-month increase based on April sales activity is a positive sign. ..." said Mark Fleming, chief economist for CoreLogic.

I was expecting the CoreLogic index to increase over the summer because it is not seasonally adjusted, however the seasonal increases usually start in June (when the Spring home purchases start to closes). This is just one data point, but it is possible this index will have small increases all summer.

I'll have more later (and hopefully a graph).