Created attachment 102121 [details]
100922-936e60a5a841, JDK 6u21, Ubuntu. File > Properties on a Maven project; had recently switched back to IDE after doing some command-line work on the project, incl. pom.xml edits. Attempting to start a transaction hangs for no reason apparent from the thread dump.
*** This bug has been marked as a duplicate of bug 191796 ***