It's not a bug - the RSS add-on should work not depending on what kind of content it displays. But in that case, you must be sure you provided a valid HTML. All tags opened should be HTML markup compatible, they all should be properly closed.
If RSS doesn't display, you should find the nature of its error, it might be seen in Firefox I guess. Most probably this could happen because there is invalid markup provided.
Ah right. It seems to be having a problem with £ signs. I should have used ASCII code for it I think instead. Anyways I have altered the default $maxTxtLength to 0 now as I only want to display titles. This seems to have cured the problem now.