Ok, when you get back to your computer in the morning hopefully you will see this. I am using X-Chat Aqua 0.14.0 on a 300Mhz G3. The following is what I get when starting up X-Chat with XWeather.py in /Applications/X-Chat\ Aqua/Plugins. It works normally when manually loaded with/load XWeather.py however.
[01:02] XWeather v1.0 by Joey @ irc://irc.moofspeak.net/scripts
[01:02] Traceback (most recent call last):
[01:02] File "/Applications/X-Chat Aqua/Plugins/XWeather.py", line 394, in ?
[01:02] doInit()
[01:02] File "/Applications/X-Chat Aqua/Plugins/XWeather.py", line 365, in doInit
[01:02] FILE = file(xchatdir + "/xweather.conf","w+")
[01:02] IOError: [Errno 2] No such file or directory: 'Plugins/xweather.conf'
[01:02] Error loading module /Applications/X-Chat Aqua/Plugins/XWeather.py