If you have received a bunch of random bizarro stuff from my blog's RSS feed - I am so sorry!!!
I don't know what's causing the problem. I'm only getting the strange posts in my Google Reader (not in Netvibes or My Yahoo! or anywhere else). It's affecting the direct feed as well as the Feedburner feed. The blog itself has not been affected, just the RSS feed. I don't know yet whether it will affect email subscriptions.
I've changed my passwords - this seems to have stopped the rubbish in the Feedburner feed. I'm not sure yet whether this is the case for the direct feed.
I'm at a loss. I don't know what to do or even who to get angry with!
Hopefully the problem will be resolved soon, but in the meantime I really do feel awful about the gunk in your RSS reader :(