intltool-merge generating garbage

["Jared D. McNeill" <jmcneill%invisible.ca@localhost>]

I've run into this problem before but I can't remember what went wrong. 
I'm working on a package that uses intltool-merge as:

LC_ALL=C 
/export/home/jmcneill/branches/pkgsrc/security/policykit/work/.tools/bin/intltool-merge 
-x -u -c ../po/.intltool-merge-cache ../po 
org.freedesktop.policykit.policy.in org.freedesktop.policykit.policy

The resulting file is completely useless however (pasted below). What am 
I missing?

Cheers,
Jared

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policyconfig PUBLIC
 "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd";>
<policyconfig><vendor></vendor><vendor_url></vendor_url><action><description/><message/><defaults><allow_any></allow_any><all
ow_inactive></allow_inactive><allow_active></allow_active></defaults></action><action><description/><message/><defaults><allo
w_any></allow_any><allow_inactive></allow_inactive><allow_active></allow_active></defaults></action><action><description/><me
ssage/><defaults><allow_any></allow_any><allow_inactive></allow_inactive><allow_active></allow_active></defaults></action><ac
tion><description/><message/><defaults><allow_any></allow_any><allow_inactive></allow_inactive><allow_active></allow_active><
/defaults></action></policyconfig>