The team posted an update on their blog about an earlier warning on issue that might cause your Live Mesh Folders to either appear to have missing files, or have unexpectedly large numbers of conflicts. The root cause of the issue (clients not synching properly after encountering too many tombstones in a row) is fixed. We actually put this fix into production early last week, and then watched to make sure tombstones were no longer causing any issues. It’s been a week now, and we’re feeling good that we have this particular tombstone issue fixed. We grudgingly admit that we are not perfect, and there might be other bugs left in our Tech Preview that cause incorrect conflicts or synch behavior – keep reporting issues that you see, and we’ll keep fixing them.
So, for now you don’t have to do a thing to fix all this! The team will email you if you were severely affected by these issues.