FWSM supported with 15.1(1)SY on VS-S720-10G in VSS mode

Cisco does not seem to keep public changelogs of its release notes. The ones of IOS 15.1(1)SY for Catalyst 6500 just got updated to state that the FWSM is indeed supported with this software version on VS-S720-10G (Sup720-10GE) in VSS mode. The previous revision said that only non-VSS mode is supported.