To evaluate the safety and effectiveness of Stealth liposomal doxorubicin hydrochloride (DOX-SL) in the long-term treatment of AIDS-related Kaposi's sarcoma (KS) in patients who previously had good responses to DOX-SL in controlled studies of limited duration, or those with KS who discontinued treatment with another Kaposi's sarcoma therapy because of inadequate efficacy or unacceptable toxicity. To provide a defined protocol for Kaposi's sarcoma patients for whom DOX-SL therapy is indicated.