Edirol have updated HyperCanvas to v1.51 and SuperQuartet to v1.50, all VSTi and DXi for Windows and Mac OS.

I won't even try to decipher the Japanese to English translation, you can read the Babel Fish attempt here - if you understand Japanese the original site is here.

NOTE: These are on Roland's Japanese web site, the English/International website still has the old updaters (v1.0x).