Locks up on the installation progress dialog (step 7 of 9 for izpack-dist-5.1.2.jar) with zero complete of both pack installation progress and overall installation progress. See attached screenshot.
Also fails on other installer projects but I figured that failing on izpack-dist-5.1.2.jar would be easy for you to replicate.
I learned of the problem from one of the users of a project that I distribute through my work at the National Institute of Standards and Technology. A user reported the problem.