I was wondering. I installed my very first mod onto my minecraft.jar folder via WINRAR. I logged onto my minecraft server and tried to use it (elemental arrows mod) but it said End of Stream and logged me out. I am not using craftbukkit and don'tplan on it, but does installing mods to a minecraft server work the same as it does in your minecraft.jar file?
Also, 3rd person I've seen do this today. Wrong forum section. Put this under "Support", not "Discussion." Please look for the right section before posting threads, really messes up the balance with em.