Wow is this frustrating or what!
I have been trying to get my custom Image Header jpg to be used by WordPress instead of the one I created using the Image Header and Color setting under Presentations.
I have tried most of the current solutions posted and nothing seems to be working.
I don't understand why the Image Header and Color setting does not have a simple setting like:
[ ] Use custom image [http://mysite/wordpress/themes/mytheme/mycustomimage.jpg
Simple and you don't have to shat glass trying to get your theme to use a custom image.
Any assistance would be appreciated.