Translated message is not found if original message contains non ASCII symbols.

I have some messages with celsius degree symbol, like this tr("message °C"). All sources are in UTF8, pro-file contains CODECFORTR=UTF-8 and QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8")) is called. I run lupdate and setup translation for message, but in programm "message °C" still be in english. If i write tr("message \302\260C"), the behavior is same.
If i change tr("message °C") to tr("message \u00b0C"), but not run lupdate and lrelease (qm-file from ts with tr("message °C")), the message in program is translated, but if i don't load qm-file, original english message is show with garbage.