Issues updating the DateFrame from another DataFrame

[waitingkuo]

http://stackoverflow.com/questions/15349795/pandas-dataframe-combine-first-and-update-methods-have-strange-behavior/15353297#15353297

[jreback]

@waitingkuo this is all fixed in master (update/combine_first/groupby with first/last)...

is there an issue?

otherwise pls close