This isn't just a minor complaint. The town freeze is so bad, I can barely move in it (and have to avoid the town altogether) just to stop the lag.
I would like to know just how many people suffer from this as I do (simply because of the terrible way that Cassandra, Gaga, Maple Admin are coded) When I'm at Aquarium's town map, I have no such lag simply because the erronous NPCs aren't in it.
My PC is kind of old but I've never really had an issue with getting around until the problems started occurring with the particular NPCs.
edit: Apparently some have pretty new PCs/laptops yet still will freeze in towns because of the aforementioned NPCs. Are you one of those people?
edit: Poll title should say "your" not "you're". derp :P