iOS 6 Mail embedded image bug (came from iOS 5)

Our org sends lots of email newsletters. The images are embedded, so they show up in the HTML as (img src="cid:image_0001") and 0002, etc., and the image files are attached to the email. The problem is Mail often pulls the wrong image from, I assume, an image cache. Thus, image 01 from an earlier email appears in place of the new image 01. The size is governed by the HTML in the current email, so often the images are stretched or squished to fit the current sizing. Sometimes by advancing to the next email, and back, the images are corrected, but often that takes several tries or coming back after a while and repeating that to make the correct images show. Of course, our email readers probably don't do that, nor should they have to. They just think the email is messed up or that we have included content (sometimes innapropriate for our organization) in the email.

I see this has been a problem since at least iOS 5.0, but never addressed and no one ever gets an answer.

https://discussions.apple.com/thread/3491250

https://discussions.apple.com/thread/3426567

http://forums.whirlpool.net.au/archive/1862898

http://www.hackint0sh.org/ios-5-x-297/email-images-bug-ios-5-01-repeatedly-displ aying-same-image-cache-360058.htm

Anyone have an idea on how to force correct loading of the image from cache?

Mitch