With the popularity of the recent collections from the space shuttle Endeavor, we continued to receive feedback that a few people with specific configurations were unable to install the Photosynth viewer. We’ve made a few tweaks to the installer that should resolve the majority of those issues, including support for 64-bit systems. If you were one of the unlucky few who couldn’t try Photosynth before, give the new installer try.
There’s no new functionality, just a better install experience, so you don’t need to do anything if you already have Photosynth installed.