I have this identical issue on a Fedora 15 x86_64 install.

What I can add is that the reason the images are broken is because accessing their URLs generates a 500 Server Error. The backtrace shows the underlying issue to be a NullPointerException.

I've tried pretty much every upgrade between 1.462 and 1.470 and each exhibits this same behaviour. I'd really like to be able to move up so that I can see if a (presumably) unrelated issue I have is healed by a later release. Wit's end, etc.

similar issue when jenkins is behind apache httpd proxy with ssl

Same here, also behind apache with httpd proxy using https:// access.

I tried to open the image in a separate window and here is the error:

Status Code: 500

Exception:
Stacktrace:
java.lang.NullPointerException
at hudson.plugins.greenballs.GreenBallFilter.doFilter(GreenBallFilter.java:50)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:98)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:87)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:47)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:162)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:50)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:81)
at winstone.FilterConfiguration.execute(FilterConfiguration.java:194)
at winstone.RequestDispatcher.doFilter(RequestDispatcher.java:366)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:331)
at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:215)
at winstone.RequestHandlerThread.run(RequestHandlerThread.java:138)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at winstone.BoundedExecutorService$1.run(BoundedExecutorService.java:77)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

I confirm that the Greenball plugin version 1.12 fixes this

Use greenballs v 1.12+

I'm seeing it on greenballs v1.13. Downgrading to 1.12 fixed it for me.