By coincedence, I am also having (trouble?) with ns_xml. I tried to re-load OpenACS 4 using the latest CVS code today and got a message saying I needed to get a newer version. I downloaded version 1.4 as pointed to in another thread. It compiled fine for me after commenting out the XSLT support from the make file because I didn't have the required library on my machine.
Strangely, I am still getting the message (on the very first OpenACS welcome/config screen) that says my ns_xml is not up to snuff and that internal "workarounds" will be used. I am positive that I have copied the newly compiled nsxml.so file to the correct directory. Can someone let me know whether I've got a real problem or the version checking code is wrong?
(I am running AOLServer 3.2+Ad12 / Oracle)
