I'm constructing a BufferedImage out of a byte array.  Each pixel in
the array is 3 bytes long, ostensibly RGB but it's actually a
monochrome image so the three channels are always the same.  My BI
construction is:

DataBuffer db = new DataBufferByte(buffer, buffer.length);
WritableRaster raster = Raster.createInterleavedRaster(db, width,
height, width*3, 3, new int[]{0}, null);
bi = new BufferedImage(indexedColorModel, raster, false, null);       

and I draw with
g2.drawImage(bi, 0, 0, getWidth(), getHeight(), null);

Now here's the funny behavior: with the interpolation mode set to
nearest-neighbor, the image only displays when the panel size matches
the image size.  If I resize the frame, the image surface goes black
(black is the zero color in my indexed color model).  If I set the
interpolation mode to nearest-neighbor, it works just fine.

Any idea what in the world is going on here???