Hudson remote xml api used with xpath query parameter returns empty results.
For instance if you try to issue a request like this:

http://deadlock.netbeans.org/hudson/api/xml?xpath=/hudson/job it states that the xpath query matches more than one node and tell you to use a wrapper

but if you use the wrapper query string parameter:
http://deadlock.netbeans.org/hudson/api/xml?xpath=/hudson/job&wrapper=jobs
it simply returns nothing!!!

An other example is:
http://deadlock.netbeans.org/hudson/api/xml?xpath=/hudson/job[0]/name
It results with the message "XPath /hudson/job[0]/name didn't match"
but it is wrong! The node 0 exists and it has a name!

These xpath queries work fine since 1.339 version..
now that machines upgraded to 1.341 the xpath queries stop to work!

It is critical issue because it stops my mobile application development.