Renée Adorée was ill with tuberculosis during filming, and the strenuous nature of filming aggravated her condition so much that she suffered hemorrhaging on set twice on set, almost shutting the production.
None of the Technicolor sequences, including at least one aria by Novarro, seem to have survived; they were missing from the print telecast by TBS in 1988-1989 and by Turner Classic Movies in 1997.