Really not much to go on here.
What is the OS type and version you are testing on?
What is the locale information for that system?
is the target file format in a different locale or that of the applicatoin creating it?
I can see from your mime output it looks like utf8...
Loglevel 5 logs might provide a little more insight...
You might want to post the log entry you are alarming on as well as the exact alarm and your match information.
we might be able to then provide more.
if you can not for security reasons I would suggest you open a support case.