[jit.gl] multiple viewports across multiple displays - bug?

Hi -

I'm trying to use scissor_test, glviewport and glscissor to render multiple viewports across multiple displays. It works, but only as long as the viewport size is smaller than my primary display. Once the viewport size = the display size, the multiple viewports stop working; a single viewport fills the whole window, and the window stays this way even after the viewport size is reduced again. The patch has to be closed and reopened for the viewports to start working again.

Example patch & javascript follow.

//begin multiViewports.js
autowatch = 1;
post ("recompiledn");

var vportLoc = [];                //positions/dimensions of viewports
var vportXno;                    //horizontal count of viewports
var vportYno;                    //vertical count of viewports
var vportXpix;                //pixel width of viewports
var vportYpix;                //pixel height of viewports
var vCount;                    //total number of viewports
var mySketch = new JitterObject("jit.gl.sketch","someport");
var myRender = new JitterObject("jit.gl.render","someport");
mySketch.glenable("scissor_test");        //enable multiple viewports

var myWindow = new JitterObject("jit.window","someport");
myWindow.pos = [0,24];

function viewportSet(xcount,ycount,xwidth,ywidth) {
    vportXno = xcount;
    vportYno = ycount;
    vportXpix = xwidth;
    vportYpix = ywidth;
    c = 0;
    for(y=(vportYno-1)*vportYpix;y>=0;y-=vportYpix) {
        for(x=0;x
            vportLoc[c] =[x,y,vportXpix,vportYpix];
            post(c,vportLoc[c],"n");
            c++;
        }
    }
    myWindow.size = [vportXno*vportXpix,vportYno*vportYpix];
    vCount = clipViewportCount(vportXno*vportYno);
    clear();
    clearColors();
}

function clipViewportCount(slots) {
    slots = Math.max(slots,1);
    slots = Math.min(slots,9);
    return slots;
}

function clear() {
     mySketch.glviewport(0,0,vportXno*vportXpix,vportYno*vportYpi x);        //set to entire window
     mySketch.glscissor(0,0,vportXno*vportXpix,vportYno*vportYpix );    

    myRender.erase();                 // bug?
    myRender.drawswap();            // have to erase+drawswap twice, once before...

    mySketch.reset();
    mySketch.glclear();

    myRender.erase();                 //....once after reset+glclear
    myRender.drawswap();
}

function clearColors() {
    mySketch.reset();
    for (n=0;n
        mySketch.glviewport(vportLoc[n]);
        mySketch.glscissor(vportLoc[n]);
         mySketch.glclearcolor(Math.random(),Math.random(),Math.rando m(),1);
        mySketch.glclear();
    }
    myRender.erase();
    myRender.drawswap();
}
//end multiViewports.js