This function seems to work in general, but in this case:
XPATH: //*[@id='leftTable']/table[1]/tbody/tr[23]/td[2]
(although it doesn't work with any XPATH).
I get the error
Error: Imported XML content cannot be parsed.
I think the problem is with the page itself, but I cannot see what Google is seeing (or can I?) Any pointers would be much appreciated.