The web outage today from about 17:01 – 17:15 was caused by an Ubuntu upgrade overwriting apachectl and a few other files.  I do not use the Ubuntu supplied Apache but rather compile from source in order to include some features not provided by Ubuntu as well as some optimizations.  But I have to let Ubuntu think it has it’s version installed in order to satisfy dependencies.  I tell it not to upgrade these things but once in a while it ignores me and does anyway.  Because I’ve done things differently it breaks things when this happens.