Coat beef cubes with the 1/2 cup flour. Brown in melted butter. Drain off excess fat. In crock pot, combine browned meat with onion, salt, pepper, garlic and beer.
Cover and cook on low 5-7 hours (all day) until meat is tender. Turn control to high. Dissolve remaining 1/4 cup flour in small amount of water. Stir into meat mixture, cook on high 30-40 minutes. Serve with rice and salad.