[mp2.0, NT] Environment variables disappearing in filter

[Matthew Bernstein]

I've been having an ongoing problem with mod_perl under NT for a while now (different mp2 builds, different apache builds, different perl builds).   I'm using a PerlOutputFilterHandler which is filtering the output of a perl-script.   If the output of the script is sufficient (this varies, but ~6k), then the POFH receives a complete environment.   Otherwise, the environment consists only of MOD_PERL, PATH and GATEWAY_INTERFACE (a bit like PerlOptions -SetupEnv).  The script seems to always get everything.   Anything I can try?  I've been trying to debug the problem, but I feel like I'm looking for a needle in a haystack given I'm totally unfamiliar with the modperl source.   Many thanks, Matthew.