Problem showing certificate properties from signed PDFs

i'm signing 2 pdf files 2 distinct signatures.
when performing following operation in adobe acrobat reader 8 obtain different results:

signatures, right button on top of "signed ...", show signature properties, show certificate

with 1 of pdfs that's possible , can see certificate properties, other cannot see properties of certificate , acrobat reader crashes.

the main differences between certificates are:

certificate results:

basic constraints: "subject type = end entity
path length = none constraint "
key usage: digital signature, non-repudiation, key encipherment, date encipherment, key agreement (f8)

certificate bad results:

basic constraints: "subject type = end entity
path length constraint = none "(critical x.509 version 3 extension)
key usage: digital signature, key encipherment, encipherment date (b0 00) (critical x.509 version 3 extension)

is adobe acrobat reader capable of obtainning signature property has critical extensions?

thanks help.

send me file tal@arx.com, i'll try have @ environment

tal
www.arx.com

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