Jeff forwarded me an email from Don that sheds light on this issue:
"The latest nsxml module dies when compiled with a somewhat older gcc,
apparently due to a bug in gcc, if you use the old-style "getattr" etc
rather than "get attr".
This version of nsxml has been out for ... ummm ... a long time so I
changed to the newer form (which avoids the bug). Does anyone think
this will be a problem? If anyone runs into trouble they just need to
upgrade to the latest nsxml module."
The requirement of a new nsxml module should probably be added to the release notes of 4.6.1.
