Is this something that you you can recreate? I've never heard of this happening before and I've been unable to get this to happen in my own tests.
Also, if all of your data was truly gone it's highly unlikely that it would come back. What's more likely is that the call from the databrowser (in the console) had a call to your collection that failed. If this is something that happens more than once and is something you can recreate that is clearly a very high priority issue for us to fix.
Please let me know if you see this again or if you can reproduce it.