Pioneer Japan released the new firmware today.
Version 1.55 Changelog:
Support Multiborder recording on DVD-R DL Media
Support New 16x DVD-R Media
Support New 8x DVD-R Media
Support New +R 16x Media
Support New +R 8x Media
DVD-R/+R DL Writability has improved.
DVD-R/+R Writability has improved
Anticipating the Buffalo version