Can evidence of a person's character be admitted in a criminal case?

Evidence Code section 1101, subdivision (a) provides that evidence of a person's character is inadmissible to prove conduct on a specified occasion, but subdivision (b) allows "the admission of evidence that a person committed a crime . . . when relevant to prove some fact (such as motive, opportunity, intent, preparation, plan, knowledge, identity, absence of mistake or accident . . .) other than his or her disposition to commit such an act." Uncharged crimes, therefore, can be admitted "when such evidence is relevant to establish some fact other than the person's character or disposition." (People v. Ewoldt, supra, 7 Cal.4th at p. 393.)