[Assist] grub 2.00.5086-1 failed validity check

[Mono]

Hallo,
when building the grub package, it says:

[grub]$ makepkg -s
==> Making package: grub 2.00.5086-1 (Wed Aug  7 16:33:25 CEST 2013)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
   -> Branching bzr://bzr.savannah.gnu.org/grub/trunk/grub/ ...
Branched 5086 revisions.
   -> Found parabola_grub_mkconfig_fixes.patch
   -> Found 60_memtest86+
   -> Found grub.default
   -> Found grub-2.00-mkinitcpio-0.15.patch
   -> Found grub-2.00.5086-fix-lvm-parsing.patch
   -> Branching bzr://bzr.savannah.gnu.org/grub-extras/915resolution/ 
...
Branched 10 revisions.
   -> Branching bzr://bzr.savannah.gnu.org/grub-extras/ntldr-img/ ...
Branched 21 revisions.
==> Validating source files with md5sums...
     grub-2.00.5086 ... Skipped
     parabola_grub_mkconfig_fixes.patch ... Passed
     60_memtest86+ ... Passed
     grub.default ... Passed
     grub-2.00-mkinitcpio-0.15.patch ... Passed
     grub-2.00.5086-fix-lvm-parsing.patch ... FAILED
     grub-extras-915resolution ... Skipped
     grub-extras-ntldr-img ... Skipped
==> ERROR: One or more files did not pass the validity check!

What's wrong with grub-2.00.5086-fix-lvm-parsing.patch?

any help is much appreciated,
cheers Mono