I've changed my feeds from del.icio.us and last.fm to use their utilities rather than RSSDigest. That has served me well for a while, but I'd prefer to get the feeds directly from the sources. The last.fm one is in the form of an image, but I can live with that. The del.icio.us one was doing the same as my category list and was shifted too far to the right in Firefox. I've fixed that for now by making the whole sidebar left justified. It's not as aesthetically pleasing, but at least everything fits on the screen now.