RSS feed: "Entity 'nbsp' not defined"

Have you tried:

– deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the Twenty Ten theme to rule out any theme-specific problems?

– resetting the plugins folder by FTP or PhpMyAdmin? Sometimes, an apparently inactive plugin can still cause problems.

Thanks, esmi, for your advice. I think the problem is with Google Chrome. I have tried the three suggestions you made, with no difference – but the feed does appear in Google when I use Firefox… weird.