Mike mentions in another thread that we’ve identified what caused this rollback for multiple EU players that were online at that time. As I’ve said elsewhere, rectifying any issues that may cause data loss remains our #1 priority. Since launching server authority with 0.9 we’ve found a number of surprising ways that varying degrees of info loss could occur that we didn’t expect and we’ve got multiple developers solely focused on making sure those are water tight. This data-center outage was a use case we didn’t foresee but now that we know it can happen we’re addressing it quickly.
Our sincerest apologies if you were someone impacted by this. We know data loss is the absolute worst and we’re working very hard to identify and correct any potential causes that we may not have seen before the MP beta launch.