Created attachment 125162 [details]
20120929-97b96013fee9. What is notable here is that _two_ threads other than EQ are trying to manipulate Swing components!
Reproducible, cannot seem to open PM in this build at all. Sep 18 build is OK.
Caused by bugfix the issue 218719 of 2012/22/09.
Jesse, thanks for the report - fixed in http://hg.netbeans.org/core-main/rev/cdd2cffe7d33
Integrated into 'main-golden', will be available in build *201210030002* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Jiri Rechtacek <firstname.lastname@example.org>
Log: #219281: Deadlock opening Plugin Manager
*** Bug 219462 has been marked as a duplicate of this bug. ***