The scripts ps2pdf.bat etc in lib/ won't work on 64 bit installs (except if GS / GSC env. vars are set), because they try to call the 32 bit version of Ghostscript: From gssetgs.bat: if %GS%/==/ set GS=gswin32 if %GSC%/==/ set GSC=gswin32c
*** This bug has been marked as a duplicate of bug 692089 ***
*** Bug 692813 has been marked as a duplicate of this bug. ***