I've just updated po for ru to 1.89. It seems to be a wrong characters in two original strings: ../src/mainWindow.py:541 ../src/mainWindow.py:543 In both strings I saw "A" with circumflex in UTF-8 (using poedit) followed by copyright sign. In russian translation I deleted them..
I've no idea why this error crept into the .pot file, but I've fixed the other .po files in CVS.