sndrizpipe v1.2 : Bug fixes and new features. Major bug fix in final drizzle stage we were weighting by ERR instead of EXP or IVM, which led to suppressed flux in the output sources. this is now fixed, and tested with std star aperture photometry, compared to synphot mags. Improvements in the _epochs.txt file handling when new flt files appear in the flt dir, we update the existing _epochs.txt file, adding new epochs as needed (but never such that we would have to renumber any existing epochs). Two new columns now record the exposure time and the angular separation from the target ra,dec to the image RA_TARG, DEC_TARG. These are helpful for identifying bad or superfluous exposures. New module for making medium band difference images mkscaledtemplate.py has become pseudodiff.py Various other small improvements and bug fixes.