6u12 was built without having a proper 6u11 fcs base-image. There is no jre1.6.0_12-pfrom11.msi in the jre*.zip

initech 119 =>unzip -l /java/re/jdk/1.6.0_12/promoted/fcs/b04/bundles/windows-i586/jre-6u12-windows-i586-p.zip
Archive: /java/re/jdk/1.6.0_12/promoted/fcs/b04/bundles/windows-i586/jre-6u12-windows-i586-p.zip
Length Date Time Name
------ ---- ---- ----
227224 01-17-09 17:03 jre-6u12-windows-i586-p-iftw-k.exe
607640 01-17-09 17:02 jre-6u12-windows-i586-p-iftw.exe
3397747 01-17-09 17:01 jre1.6.0_12-c-k.msi
11924429 01-17-09 17:01 jre1.6.0_12-c-l.msi
10493432 01-17-09 17:00 jre1.6.0_12-c.msi
1503587 01-17-09 17:00 jre1.6.0_12-pfrom10.msi
11924145 01-17-09 17:00 jre1.6.0_12-s-l.msi
10493320 01-17-09 17:00 jre1.6.0_12-s.msi
 45472 01-17-09 16:59 jre1028.MST
 52358 01-17-09 16:59 jre1031.MST
 49999 01-17-09 16:59 jre1034.MST
 50551 01-17-09 16:59 jre1036.MST
 49343 01-17-09 16:59 jre1040.MST
 46714 01-17-09 16:59 jre1041.MST
 47621 01-17-09 16:59 jre1042.MST
 49856 01-17-09 16:59 jre1053.MST
 44674 01-17-09 16:59 jre2052.MST
------ -------
51008112 17 files

This bug has to be fixed in 6u13.