4.6.5 contains a potpurri of new features. Setting chunk cache size with --cnk_csh can accelerate aggregation of netCDF4 files. Climatology and regridder users may appreciate the cleaned-up ouput offered by the ncremap --vrb_lvl switch and more intelligent grid inferral. Everyone who has tried to convert "time since..." values to calendar dates will like the new ncks --cal switch that does the UDUnits conversion for you. There are also helpful bugfixes for ncap2 attribute propagation in corner cases, and corrected error codes for bad command line arguments.