I am working with an upgrade to 1.25, and just went in to test a style change, and things proceeded with no problems or errors along the way.
Seems there was an error in crcfg.dat before the upgrade...try restoring backup, as Dale suggests, to find it before upgrading...
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly.
Specialization is for insects.
-Robert A. Heinlein