I'm running v.0.8.49 with GeoIP using both a city and a country database. All of the GeoIP-generated parameters passed via FGCI seem to work great, except that $geoip_postal_code comes through empty.

I've checked my fastcgi_param declarations several times (my symptoms seem to point to a config issue since only one variable is impacted) but everything looks in order. MaxMind states that they don't have postal codes for all IPs, but I've tried on a few different IPs in the same general area here in the US with the same results--no postal code reported. I don't believe it's an issue on the FCGI application side, since I'm just doing a dump of the whole environment at this point.

Looking at the logfiles (debug level logging), the only thing out of order is

2010/08/23 17:39:03 [notice] 13420#0: getrlimit(RLIMIT_NOFILE): 1024:1024

which does not seem like an issue given that the number of served files will be less than 10 on this machine.

Any suggestions as to how to debug the parameter issue?