Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
It is possible that IM 6.0.7 had a cropping bug. You could try replacing +repage with -page 0x0+0+0 and see if that makes a difference. We tried your command with the latest release of ImageMagick, 6.3.0-0, and it worked as expected.