Okay so we got the error 100 thing again. Now I'm not just going off and making some post about it to waste space and be annoying. As far as I know this hasn't been reported yet so maybe it can help in stopping from happening ever again: About 30 mins before the server went down, this error was returned when trying to build around the chunks above the stronghold. "This chunk is currently being refreshed. Please try again later." This later spread to LordRedstone's base as well. Then I went for a ride in the rails and the server went down. I should add, that stuff can happen in the chunk, it just can't happen directly in the chunk: So you can't place destroy or modify blocks, but pistons and flowing water just don't give a shit and invite themselves right in.