I don't know how to get a response from Yahoo and it is practically impossible to contact anyone. Howevwer, here is my problem just in case someone is reading this. There is a problem in the split adjusted price series for GOOGL and SNV and perhaps others. It seems that the split date is not confirmed when you adjust for prices after downloading raw data (I need highs and lows adjusted as well as closing prices, so I have to do it myself using the confirmed split dates). Please advise.