Now that an empty QLineEdit keeps placeholder text visible when focused (https://qt.gitorious.org/qt/qtbase/commit/eeb31ad), the cursor blinks incorrectly on top of the placeholder text on windows.

Test case:

#include <QtWidgets>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QLineEdit le;
    le.setPlaceholderText("Foo");
    le.show();
    return a.exec();
}

Notice that when you enter "F" and move the cursor in front, the cursor is in the correct position. When you erase "F", the cursor goes back to the incorrect position on top of placeholder "F".