"Diff'rent Strokes" star Gary Coleman is in the hospital with more kidney problems. A spokesman said Coleman, 22, whose congenital kidney problems have led to two transplants and dialysis, is resting comfortably and in good spirits in an unspecified hospital in Tucson, Ariz. Coleman, who has been living outside Denver since an ugly rift with his parents, should be released in about a week, the spokesman said.