A sculpt I've been working on failed to load. After a brief investigation I found that the .sculpt file itself was empty -- 0KB. This is a file that I had saved and loaded previously several times, so this must have happened last night when I saved it for the last time before closing Medium.
Luckily this was a duplicate of the original model and only represented a couple hours of additional work, so not much actual work was lost. Still, kinda sucks.
I've attached the model files. Please let me know if there are some log files I might be able to send.