I can't type backslash(U+005C, REVERSE SOLIDUS) with JIS(Japanese) keyboard in Qt apps. When I tried to input backslash, it becomes YEN SIGN(U+00A5). I checked it on MacBook with Japanese keyboard(Mac OS X 10.6.3). Using this keyboard, usually I can input backslash via pressing alt + yen-sign key. ex. TextEdit.app I attached the log when I enabled debug outputs in src/gui/qkeymapper_mac.cpp. I typ