Alas, I have never had good luck in my irregular upgrades of krpano -- my older XML files tend to break in new versions. My latest fun is getting "fatal error -- xml parsing failed" with no additional information like what line or element the problem was on. All the files load fine in firefox and show no syntax errors. I had a series of includes so I hand combined them and still there's an error -- but no clue as to where.
So what are the best techniques to diagnose this?