Complex Image URL's not rendering

User is using graphite to render a dashboard of usage statistic.

A Complex URL is required to render these images. Render succeeds in previous version of Confluence 3.5.x, but not in the latest. An example of one such complex url is below.

http://graphs:81/render/?width=586&height=308&_salt=1348850407.992&target=xxx.xxxbldao850.stats.loadavg.15min&target=xxx.xxxbldao850.stats.loadavg.1min&target=xxx.xxxbldao850.stats.loadavg.5min

When inserting an image with this URL the image renders correctly in preview mode, but when the image is saved the image does not render correctly.

Supposition is that this might be do to the change in storage format.