You just have to save the post again(update) so the correct mark up is added to the images.
I am using the code from this post: http://ww.wp.xz.cn/support/topic/plugin-wp-super-cache-google-adwords-gclid-parameter-conflicting-with-caching
Problem is that by using it I loose all Google Adwords tracking.
I could disable caching for pages with GET, but many pages make use of GET, so most traffic would not be cached.
Donnacha, couldn’t you come up with a way to pass the gclid parameter to a cached pages.
At first, it could be something as simple as duplicating on the fly an already cached page and appending the glcid parameter. I don’t know it that can be accomplished with rewrites in htaccess.
I hate having to choose caching over tracking or vice versa.