The current version of DiFX is 2.2.0. Some plans for changes to be incorporated in the next major release are:

• mpifxcorr: Datasteam buffer send size now calculated correctly for complex sampled data
• mpifxcorr: Avoid very rare bug where combination of geometric delay and data commencing mid-subint meant one invalid FFT might be computed
• mpifxcorr: multicast weights are now computed correctly for mixed-sideband correlation
• mpifxcorr: fixed bug where some autocorrelations were not saved in a mixed-sideband correlation
• mpifxcorr: fixed bug where send size could be computed incorrectly by 1-2 bytes for Mark4/VLBA/Mark5B/VDIF formats, potentially resulting in very small amounts of data loss

• mpifxcorr: LO offsets are now corrected in the time domain when fringe rotation is also done in the time domain (the usual mode), allowing considerably larger LO offsets without decorrelation
• mpifxcorr: Working polarization dependent delay and phase offsets
• mpifxcorr: Experimental linear2circular conversion
• mpifxcorr: Complex Double sideband (RDBE/Xcube) sampling support
• mpifxcorr: new file/mk5 based vdif/mark5b datastream (faster and more robust)
• utilities: some new command line tools for mk5b and vdof files (vsum, mk5bsum, vmux, mk5bfix)
• all packages: mk5 support for mark5a/b with sdk9
• new options for passing calibration (Walter B: memo forthcoming)