These are the 2015B release notes containing changes since the 2015A Starlink release. General Some contact email addresses have been updated. Allow object names with apostrophes or equals signs. Debug mode will now print the command lines used into the log. Line graphics leave gaps for missing values and hence are clearer. ACSIS Legacy processing of large spatial areas or many input timeseries cubes now supports chunking to avoid addressing too many voxels. No longer create "cube" files in the REDUCE_SCIENCE_LEGACY recipe. Improvement made to spike filtering limits. Better handling of hybrid-spectra combination when the overlap is small. Tile borders removed from frame cubes. Improved histogram-peak finding algorithm to cope with more unusual distributions. Fixed bugs including calculation of median Tsys for large and sparse datasets, and flatfield determination for curtailed observations. LCOGT Synchronised to 2015-10-22 LCOGT's subversion repository. UKIRT Extends the search for sources in chopped observations but restricted to prevent picking up the wrong beam. Copes with chopped data where the original beam information is lost. New Michelle bad-pixel mask provided from 20150301. Switch suffix of output file of _STANDARD_BLACKBODY_ from _dbs to _std. Handle missing END header in FITS airlock when extracting sources. JSA primitives _COPY_JSA_HEADERS_TO_FITS_FILE_ now includes the WAVELEN, BANDWID and OBJECT headers. _DETERMINE_CLASSES_ copies "locked" uhdr values to temporary objects.