Official GW 40K Errata and FAQ (7th edition link on page 7)

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KFF is only a 5+ save on vehicles now?

that would make more sense. i thought it was a 4+ as well.

still, its not consistent which is the annoying thing. i dont mind which ruling is used as long as its consistent.

BW's are AV14 only on front? i thought it was front as side. Hmmm thats more interesting.

battle wagon are 14 front 12 side and 10 rear with 4 hull points, and the kustum force field is only a 5+ save (used to be 4+).

the ork faq says the kustom force field is 6" from the mek, so that means i have to put the mek on the tank and measure from him, which is what i'll do in future, used to measure from the tank that the mek was in (which still might be the case).