esmi on "XML Parsing Error: not well-formed Location"

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.