According to Herbert Voss (who maintains the pstricks package):
"On CTAN is a fixed version since several days. And TeXLive already has it" -- Herbert
So, the problem (according to Herbert) is that the MikTeX repos are (still) out of date wrt to pstricks. I just looked 5 minutes ago, and they're still showing an update available for the 2.80a build (31-Dec), which is the same version from ~7 days ago that had the bug in it that several people have posted on.
The older version of pstricks (11-28-2017 build date) still works, so until MikTeX repos are updated to the latest and greatest, you either ignore the MikTeX update, or pull down a version yourself from CTAN.
------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Q: How can I leave the mailing list? A: See http://docs.miktex.org/faq/support.html#leavingml
