Remains an issue in 13w41a (and b)
Confirmed for 13w41a (and b)
Missingno_26: In 13w39b, and presumably for some snapshots prior, SpawnData appears to have been removed, and replaced with Properties, which seemingly has the exact same function. I feel that this issue probably relates to the lack of SpawnData though, and may be residual from this previous issue:
https://mojang.atlassian.net/browse/MC-12381
I believe that this may once again be an issue (13w39b). Can anyone else confirm? SpawnData seems to have been replaced with Properties, and I'm wondering if this is the cause of my issues.
Using 1.6pre, and also experiencing this issue. The launcher still shows the error messages in SP, but everything works fine. However, loading the map containing the Spawners in both LAN and Server MP results in a crash.
Can confirm for 14w03b.