I managed to fix the "Chat Spam Bug" by switching over to Xnyder's "myUI."
Hmmm, was that plug to shameless?
On a side note, I haven't really messed with renaming the chat windows since I switched to myUI, since renaming those windows seemed to have caused my nights of "chat-window-hell."
Is the chat-window code in Vanguard just that bizzare that changing the name of the window is enough to send the ui into a death spin? I'm just curious.
Thanks for all the replies!