since the last Update to Java 1.7 U55 we cant use umlauts like äöü in our Java Program. This Problem is only on Mac systems and have been tested multiple Systems with Mavericks. We tried to setup file.encoding=US-ASCII and UTF-8 with no success. Is there any possible Solution to set the correct case encoding?
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You might try Googling. I found this, but I don't know if it applies to your situation.