URL generation in multisite went defective about a month ago as Domain Mapping began to include blog name in internally generated URLs.
Here is the video illustration of the bug: http://www.screencast.com/t/UMgfMwFG
This caused a great many internal links to become defective, including for graphics and internal editor resources. The defect applies to standard wp-content resources.
This issue renders most console functions unusable.
Thanks in advance for the help.