logback on a mac returns question marks instead of words

I'm just start using logback for logging my Java project running on glassfish3 AS, and I'm noticing some strange thing. This string of code

LOG.error("Вычисление {} уже произведено.", calc);

generates normal expected output if I'm running my application on windows. But if I'm the same configuration on Mac, I'm having question marks instead of words, like so:

15:37:29.083 ERROR r.g.g.c.TotalNachController - ?????????? [id=8871] ??? ???????????.

my logback configuration is:

<appender name="FILE" class="ch.qos.logback.core.FileAppender">
    <file>../logs/logback.log</file>
    <encoder>
        <pattern>%d{HH:mm:ss.SSS} %-5level %logger{35} - %msg%n</pattern>
    </encoder>
</appender>

Could someone please tell me, what I'm doing wrong?