Ok. Thanks for the feedback. This gives me some pointers to where I 
should start looking.
I looks like that unless I can find a way to call UTF-8 aware file 
methods the plugins are doomed to run into bugs and malfunction.
I'll dig into Windows' Unicode capable API and query the Sketchup 
scripting and plugin community and see if we can find a solution. Maybe 
Google Sketchup devs can provide some assistance as well.
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