Message3486

I tried to reproduce it on Vista, running jre 1.6.0_7.
The installer runs fine.
When calling jython.bat, I got the (German) message:
"Files\Java\jre1.6.0_07""" kann syntaktisch an dieser Stelle nicht
verarbeitet werden.
, which - roughly translated - means that the .bat file has a syntax error.
REMing all the @echo off statemtents, I get the following output just
before the error:

C:\jython2.5a2>setlocal enabledelayedexpansion
C:\jython2.5a2>rem ----- Verify and set required environment variables --
C:\jython2.5a2>set _JAVA_CMD=java
"Files\Java\jre1.6.0_07""" kann syntaktisch an dieser Stelle nicht
verarbeitet werden.
C:\jython2.5a2>if not ""C:\Program Files\Java\jre1.6.0_07"" == "" (
C:\jython2.5a2>

Now I'm not too much a .bat file expert, but I'll poke around with it a bit.
And I am pretty sure that is NOT an issue with a newer jre:
If I switch to jre1.5.0_15, the error message is exactly the same.