inconsistent results with utf8

[Ben]

I've been trying to use taglib and the tagwriter example program it  
comes with to retag all my classical music (which frequently have non- 
ascii characters in them) and I'm running into problems. What's  
worse, nothing seems to be consistent.... what works sometimes will  
other times write junk. I'm really at a loss as to what might be  
happening, and was wondering if somebody else might have experienced  
the same issues.

I've noticed that if I try to write multiple fields, the first one  
tends to stay uncorrupted far more than following fields. So I've  
changed my scripts to only edit one field at a time. That seems to  
work better, but obviously something seems busted.