Layer.translate() making layer disappear

Question

Hi,
Experienced a strange problem trying to move layers with layer.translate(). I had a pretty peculiar case of a bunch of 1px tall and 400px wide dividers as simple artLayers stacked on top of each other. Then I tried to move them vertically to even spacing, i.e. move first one 10px, second 20px, etc. However what happened is that seemingly randomly some layers disappeared after the translate()-operation. When layer disappeared, layer.bounds was correctly [0, 0, 400, 1] before operation, and [0, 0, 0, 0] after operation ie. the pixels really seemed to disappear. I also tried making sure there is no selection and setting the layer as selected before moving, but same results.
What helped was making the height bigger, e.g. adding an almost invisible dropshadow. It's like Photoshop CS6 would make a rounding error in bounds calculation and decide it became empty. Anyone with similar experience, workarounds?
Matias

Answer 1

You are aware that the lines will all end up atop one another with those settings?
The AM code seems to provide a different result from the DOM code in that the Layers have proper bounds.
#target photoshop
var HEIGHT = 5
app.preferences.rulerUnits = Units.PIXELS
var doc = app.activeDocument
for (var i=0; i < doc.artLayers.length; i++) {
    var layer = doc.artLayers[i]
    doc.activeLayer = layer
    doc.resizeCanvas (doc.width, doc.height + HEIGHT, AnchorPosition.BOTTOMCENTER)
//    layer.translate(0, -HEIGHT);
    moveLayer (0, -HEIGHT);
function moveLayer (theX, theY) {
// =======================================================
var idmove = charIDToTypeID( "move" );
    var desc3 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref2 = new ActionReference();
        var idLyr = charIDToTypeID( "Lyr " );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref2.putEnumerated( idLyr, idOrdn, idTrgt );
    desc3.putReference( idnull, ref2 );
    var idT = charIDToTypeID( "T   " );
        var desc4 = new ActionDescriptor();
        var idHrzn = charIDToTypeID( "Hrzn" );
        var idPxl = charIDToTypeID( "#Pxl" );
        desc4.putUnitDouble( idHrzn, idPxl, theX );
        var idVrtc = charIDToTypeID( "Vrtc" );
        var idPxl = charIDToTypeID( "#Pxl" );
        desc4.putUnitDouble( idVrtc, idPxl, theY );
    var idOfst = charIDToTypeID( "Ofst" );
    desc3.putObject( idT, idOfst, desc4 );
executeAction( idmove, desc3, DialogModes.NO );