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http://www.netbeans.org/download/nbms/34/treefs.nbm in its Info/info.xml starts with: <!DOCTYPE module PUBLIC "-//NetBeans//DTD Autoupdate Module Info 2.0//EN" "http://www.netbeans.org/dtds/autoupdate-info-2_0.dtd"> This is quite wrong; NB 3.4 did not support this DTD (introduced in issue #22948). The 3.4 version of treefs.nbm may not use that DTD. The 3.4 version of <makenbm> did not produce it, either. That means someone was using a post-3.4 dev build to create the NBM, which generally will not work. It should be built from 3.4 sources: cd .../r341/nb_all ant -f nbbuild/build.xml all-treefs ant -f treefs/build.xml nbm The symptom: updating this module from AU can hang the updater (hence the P1). You have to kill the updater and manually delete the NBM before it will stay dead. I am unable to reproduce the hang, but it has been reported on nbusers and seems plausible; at least the NBM format is definitely wrong.
I'll fix it ASAP.
New NBM with DTD http://www.netbeans.org/dtds/autoupdate-info-1_0.dtd was built and uploaded to the Beta UC for Netbeans 3.4.1