This fix will be added to the next Auto Update.  In the meantime, you can download it here.

Details

In a sequence of rapid uploads/downloads, when downloading a file from Box while the Box server is processing a previous upload, you don't always get a previous file version downloaded from Box, sometimes you get a zero byte version. Once that zero byte version is in the 'stream', you basically have a corrupt file situation.

Many thanks to the folks at A10 Capital for helping to identify the cause and work with us to test the solution.