Recommendations about xmltramp

[Jonas Hei]

I'd like to get experts' opinion about
xmltramp (http://www.aaronsw.com/2002/xmltramp/).

I am still in early stages of exploration - I need to
  determine to process XML in my next project.
Currently I like ElementTree (@ effbot.org) and xmltramp.
But I am bit concerned about Mark Pilgrim's comments about
xmltree(http://diveintomark.org/archives/blinks/2003/12/#b20031218035253)

Can anyone elaborate/explain about scenarios in which xmltramp can corrupt  
data?
Or was it all just a joke...