I expect version 1.03 will go on the official site garritan.biz on Friday or Monday, so if you want to be sure you are running the official version make sure you download it from garritan.biz, not from the link here. Meanwhile... you are very welcome to download what will most likely be the version that gets posted on garritan.biz, which is the release candidate version of 1.03 (applicable to all Steinway editions), available from this link as a public beta.
Here are the release notes for Version 1.03, for what's new, fixed, or changed.
General Steinway fixes and changes:
Fixed: Sustain Resonance decay
Fixed: Sustain Resonance noise artifact
Fixed: Potential Sustain Resonance crash on Macintosh
Fixed: Note response across dynamic range
Changed: Pedal 'Mechanical Noise' volume lowered, for low settings in the UI
Changed: Mod wheel (CC1) now controls release sample volume
Changed: Note-ons with velocity 1 now silently triggers notes
ARIA player fixes and changes:
Fixed: Staccato release time
Fixed: Sustain and Sostenuto pedal interactions with note-holding
Fixed: Sustain and Sostenuto pedal interactions with release samples
Fixed: Multiple Core CPU issue