I'm not sure that's true. ….
This website (http://www.patentlens.net/daisy/adjuvants/Background/Adjuvant_types.html) talks about how aluminium salts have been used as adjuvants since the 1930s.
Or maybe it is.
A quick look showed this, which implied it was a new formulation:
"The immune response against the virus that causes cervical cancer is stronger and sustained following vaccination with GlaxoSmithKline's (GSK) candidate HPVvaccine formulated with the innovative AS04 adjuvant compared to using the same vaccine formulated with a conventional aluminium salt adjuvant. "
It is an interesting area to sort out for those interested in adjuvants, and their role in efficacy and vaccine safety.