Patients receive bortezomib IV over 3-5 seconds on days 1, 4, 8, and 11. Courses repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients with disease progression continue to receive bortezomib as above and doxorubicin IV over 2-5 minutes on days 1 and 8. Treatment repeats every 21 days for up to 14 courses in the absence of further disease progression or unacceptable toxicity.