[CentOS] How can rpm "%{SUMMARY}" not be consistent?

> -----Original Message-----
> From: Denniston, Todd A CIV NAVSURFWARCENDIV Crane
> Sent: Tuesday, November 29, 2011 10:54
> To: 'CentOS mailing list'
> Subject: RE: [CentOS] How can rpm "%{SUMMARY}" not be consistent?
> 
> ####and for added fun... look at an agg package from epel
> $ export LANG=en_US.UTF-8
> $ rpm -q --qf '"%{VENDOR}","%{NAME}","%{VERSION}","%{VERSION}-
> %{RELEASE}","%{ARCH}","%{SUMMARY}"\n' agg
> "Fedora Project","agg","2.5","2.5-9.el5","i386","Anti-Grain Geometry"
> $ export LANG=
> $ rpm -q --qf '"%{VENDOR}","%{NAME}","%{VERSION}","%{VERSION}-
> %{RELEASE}","%{ARCH}","%{SUMMARY}"\n' agg
> "Fedora Project","agg","2.5","2.5-9.el5","i386","Anti-Grain Geometry
> graphical rendering engine"
> 
> Why does the string length change this dramatically based on LANG?

###And even more fun... try compat-db
$export LANG= ;rpm -q --qf
'"%{VENDOR}","%{NAME}","%{VERSION}","%{VERSION}-%{RELEASE}","%{ARCH}","%
{SUMMARY}"\n'  compat-db
"CentOS","compat-db","4.2.52","4.2.52-5.1","i386","The Berkeley DB
database library for Red Hat Linux 7.x compatibility."
$ export LANG=en_US.UTF-8 ;rpm -q --qf
'"%{VENDOR}","%{NAME}","%{VERSION}","%{VERSION}-%{RELEASE}","%{ARCH}","%
{SUMMARY}"\n'  compat-db
"CentOS","compat-db","4.2.52","4.2.52-5.1","i386","The Berkeley DB
database library for CentOS 2.1 compatibility."

Yep that seems a strange one.