Can't verify msgs except w/view original, Kubuntu 7.04, GnuPG 1.4.6

Gmail seems to be mangling messages, causing them to be unverifiable except when I view original. I made a diff of an MDKSA message for a test, see below. Is this expected functionality or a bug? Am I doing something wrong?

kunwon1@kunwon1:~$ diff -w first second           #doesn't work ignoring whitespace either!
96a97
>

kunwon1@kunwon1:~$ diff -wB first second         #works if you ignore whitespace and blank lines

kunwon1@kunwon1:~$ diff first second > diff

kunwon1@kunwon1:~$ cat -A diff
5c5$
< $
---$
>  $
9c9$
< $
---$
>  $
14c14$
< $
---$
>  $
16c16$
< $
---$
>  $
22c22$
< $
---$
>  $
27c27$
< $
---$
>  $
32c32$
< $
---$
>  $
36c36$
< $
---$
>  $
38c38$
< $
---$
>  $
41c41$
<  0a2ecfcd4950075f788a68c16e6a513d  2007.0/i586/mutt-utf8-1.5.11-5.2mdv2007.0.i586.rpm$
---$
>  0a2ecfcd4950075f788a68c16e6a513d  2007.0/i586/mutt-utf8-1.5.11-5.2mdv2007.0.i586.rpm $
46c46$
<  c8a815d5f8de4cf548084bbcb0cc4957  2007.0/x86_64/mutt-utf8-1.5.11-5.2mdv2007.0.x86_64.rpm$
---$
>  c8a815d5f8de4cf548084bbcb0cc4957  2007.0/x86_64/mutt-utf8-1.5.11-5.2mdv2007.0.x86_64.rpm $
51c51$
<  f6db8984bf23a3dfb38ac0aa50fc521f  2007.1/i586/mutt-utf8-1.5.14-1.1mdv2007.1.i586.rpm$
---$
>  f6db8984bf23a3dfb38ac0aa50fc521f  2007.1/i586/mutt-utf8-1.5.14-1.1mdv2007.1.i586.rpm $
56c56$
<  980c4db7c94c05cf53329b085b0d44d8  2007.1/x86_64/mutt-utf8-1.5.14-1.1mdv2007.1.x86_64.rpm$
---$
>  980c4db7c94c05cf53329b085b0d44d8  2007.1/x86_64/mutt-utf8-1.5.14-1.1mdv2007.1.x86_64.rpm $
61c61$
<  e8edc6bc6d2726c87841c26140293f3a  corporate/3.0/i586/mutt-utf8-1.5.5.1i-2.3.C30mdk.i586.rpm$
---$
>  e8edc6bc6d2726c87841c26140293f3a  corporate/3.0/i586/mutt-utf8-1.5.5.1i-2.3.C30mdk.i586.rpm $
66c66$
<  3f7729407df0c9037c5514c3f9b746fe  corporate/3.0/x86_64/mutt-utf8-1.5.5.1i-2.3.C30mdk.x86_64.rpm$
---$
>  3f7729407df0c9037c5514c3f9b746fe  corporate/3.0/x86_64/mutt-utf8-1.5.5.1i-2.3.C30mdk.x86_64.rpm $
76c76$
<  gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98$
---$
>   gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98$
80c80$
<  http://www.mandriva.com/security/advisories$
---$
>   http://www.mandriva.com/security/advisories$
84c84$
<  security_(at)_mandriva.com$
---$
>   security_(at)_mandriva.com$
89c89$
<  <security*mandriva.com>$
---$
>   <security*mandriva.com>$
96a97$
> $