I don't know if
this is the post you are talking about, but I have skimmed over it before. The 0x29 Region flag is what looks interesting. If the client is sending zone points hardcoded in the zone file, then why do some zones work and others don't? It would seem that they all work, or none work. I'll have to take a closer look at the .wld files tonight and see if I find anything useful in there. Thanks for the pointer.
