If you are running Roundcube 0.1.1, maybe I can help.I've patched the sources to add a user preference for blocking/allowing images in HTML messages. If you know how to run the patch utility, have a look here: http://www.convoglio.com/roundcube/-Stevep.s. I'll be contacting the developers about my changes. But, really, they don't need my help with something as easy as this.
What is 51c51,53 and 60c62 ?