I have version 126.96.36.199 - still in the first 30 days of use (still in demo mode). I made a personal brain file, and downloaded the zip of the file to my home PC.
At work, I made changes to this brain and synced those changes to the server. When I came home, I opened up the brain using the brainzip and clicked on sync, hoping to get all the changes that I had made to the brain from the webbrain sync.
Instead, what appears to have happened is that the older brain file that I opened at home overwrote all of the changes I had made and synced to WebBrain.
So I just lost a few hours of work on this Brain.