For some unknown reason the latest byond client update is causing Sunday the 19th to crash and totally freeze dream seeker.
At the moment Eviler is on holiday and won't be back til tuesday so he can't properly look into this. (Although I'm not sure it's a problem with the coding)
Anyways to avoid all crashing in-game for the moment turn off your SFX under the player tab.
This will fix things for the time being