This issue was reported manually by musilt2.
It already has 63 duplicates 


Build: NetBeans IDE 7.3 Beta (Build 201210011125)
VM: Java HotSpot(TM) 64-Bit Server VM, 23.6-b04, Java(TM) SE Runtime Environment, 1.7.0_10-ea-b12
OS: Mac OS X

User Comments:
GUEST: Nothing special,

GUEST: Open the code template setting

GUEST: Opening plugins manager

GUEST: adding simple comment sign -> "//"

rweaver: And even slower - at 25% on transferring maven repository index: Central

facilityderek: Possibly caused by unresponsive Plugin server?

GUEST: trying to install C/C++ plugins

alfbennett: Trying to load a web service

GUEST: Just hang whenever open the plugins window.

GUEST: Trying to update. It was looking for dependencies.

onman: I created a new file in my project tree by clicking with the right mouse button on a subdir of the project's 'Source Files'.

GUEST: download plugin

GUEST: I used the hudson repository for jax-rpc plugin (http://deadlock.netbeans.org/hudson/job/nbms-and-javadoc/lastStableBuild/artifact/nbbuild/nbms/updates.xml.gz). Deleted this repository solved my problem.

GUEST: Slowness and lack of feedback in the update process.

GUEST: The updater has 24 updates, and it is making Netbeans slow.  "Please Wait While checking on Dependencies..." message never goes away.

musilt2: Invoking update with >200 updates

GUEST: Just noted many spell cheker errors in a classfile.

GUEST: Panel designer up and running....  not doing anything in particular...

GUEST: I added a new update centre and now it's running very slowly.

GUEST: while open plugin dialog, and the progressbar tell me it's doing "Initializing the list of plugins..."
also, I've added a plugin site URL as below:
http://deadlock.netbeans.org/hudson/job/nbms-and-javadoc/lastStableBuild/artifact/nbbuild/nbms/updates.xml.gz

rweaver: Transferring Maven repository index Central

Tried starting plugin center, froze at "initializing"

GUEST: Update IDE

GUEST: typing code then "found updates" popup appeared

esmithbss: Expanding the list of installed plugins.

GUEST: do nothing :/ just browsing internet :/

GUEST: Looking for plugin updates

GUEST: update netbeans plugins,
stuck on 'initializing the list of updates'

GUEST: Update of IDE is always at 0% of progression
There is no network traffic

GUEST: The plugin installer doesn't get the list of dependent plugins



Maximum slowness yet reported was 532164 ms, average is 58772