ofDrawBitmapString renders incorrectly in an ofFbo

On the current dev branch, ofDrawBitmapString works fine in a normal drawing context, but it seems to render upside-down when rendered to an ofFbo.

myFbo.begin();
ofDrawBitmapString("Hello World!", 100,100);
myFbo.end()
...
myFbo.draw();  // Hello World! will be drawn upside-down.

while normal use works fine.

A quick test is to drop the following into the fboTrailsExample in the drawFboTest() method:

//--------------------------------------------------------------
void testApp::drawFboTest(){

    ofDrawBitmapString("Hello World!", 100,100);

    //we clear the fbo if c is pressed. 
    //this completely clears the buffer so you won't see any trails
    if( ofGetKeyPressed('c') ){
        ofClear(255,255,255, 0);
    }   
...

Looks like it needs a little vertical flip.

Start with the fboTrailsExample and its drawFboTest() method, adding the reported ofDrawBitmapString call to reproduce the difference between normal drawing and an ofFbo. Read the ofFbo and bitmap-string drawing paths involved in that example. Done means the text has the same upright orientation when drawn through the FBO and directly.