FULL PRODUCT VERSION :
mustang early release

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
 In com.sun.imageio.plugins.bmp.BMPImageReader.decodeRLE is this rounding code

                  // Whenever end pixels can fit into odd number of bytes,
                    // an extra padding byte will be present, so skip that.
                    if ((((int)Math.ceil(end/2)) & 1) ==1 ) {
                        count++;

notice that end/2 is an int so ceil doesn't make any sense.

Perhaps you want end/2.0


REPRODUCIBILITY :
This bug can be reproduced always.