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?".
A path forward would be to post a URL to your images and the command you used to create the JPEG image. We need to reproduce the problem in order to fix it. Also mention which version of ImageMagick you are using.