But... I swapped Xalan with Saxon 6.5.3 in Forrest and I get a NPE :-(
That's not unusual. Did you use the most recent Cocoon?
I suppose there are no document() calls in the style sheet, because at least in the Cocoon releases I used it gets passed null as Source quite often for no obvious reason. Xalan tends to ignore this, while Saxon barfs.
J.Pietschmann
