Unfortunately, I cannot test Limewire on Mac OS Classic or OSX.
So I don't know which possible issues exist on this platform related to the international support of the Java port for MacOSX.
So ask for support to the Lmewire dev team, may be Sam has the tools to test it.

I have no problem with Chinese on Windows XP, even on my French version, because I have installed it with the support for complex scripts and asian scripts, and I have the necessary fonts too.
For now I have not experimented this message saying that a character is not supported.

It may happen that your Mac only has fonts for Chinese and Basic Latin, but it lacks some fonts for extended Latin, and it may cause this Latin extended character to not be supported.

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