Have applied the official WP patch, and everything is working fine.
Thanks to me for help 😉
OK, looks like this is a WP 1.5.1 bug, which is the version I am using.
See http://fernando.dubtribe.com/archives/2005/05/10/solution-to-wp151-rss-errors/
If I upgrade to the latest version, rather than apply a patch, should this solve the problem?
I just installed the Mudbomb Wysiwyg editor on my site, and it works great. I talk about it at http://www.jointhedigirati.com
I tried everything in the Send Referrers help, and it didn’t work for the problem I was having. I was using the Maxthon browser and thought this may be the problem.
I switched over to Firefox in order to install a plugin, and everything worked fine.