Thank you for your confirmation of the bug.
More information to solve the problem :
If I run my ".bat" file with administrator rights the command-line renderer doesn't crash. But now :
1   FF says it is a trial version, 29 days left.
2   FF says it can't find my xml file, although it is in the same directory as the ".bat" file and the version 4 renderer works without specifying the full path.
If I extend to the full path of the xml file in the commandline in the batch file, it is rendering.  
 
So please, solve the three issues (crashing (administrator rights needed to run), authorisation problem (trial version) and the need of the full path length).
Are this 3 bug points?