What client are you using to do that and how are you moving them?
Those opcodes are for SoF and they are the client sending a checksum that the server basically just ignores (like it is supposed to). It's something EQLive uses to verify the client is running the correct patch version, I believe.
Sounds like that player is using SoF, which should be enabled by defauly on R408, but there have been many updates and fixes for it since then. If you can't compile the current source yourself, you may want to wait until the next binary update (probably sometime soon) before doing too much support for SoF players.
Also, make sure that you copy the patch_SoF.conf file from your /utils directory into your main server directory. It is very important that you do that for at least the SoF file each time you update right now, since we are constantly adding new ones to it. Though, it is almost fully completed right now
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