+ParseHeaders random corruption

["Mark Farver" <suppressed>]

Kind of an odd one, we just upgraded a major application from Mod_perl
1.29 running on Apache 1.3.34 (compiled from source) to modperl
2.0.2/apache 2.2.3 (default Centos RPMs, not from source)

Occasionally ParseHeaders misses detecting the "Content-Type: text/html"
header (it gets printed in the content instead) causing a rendering
problem as Apache defaults to text/plain.

Whenever this happens we get odd garbage in the logs:

[Thu Sep 20 21:34:24 2007] [error] [client 192.168.18.13] malformed header
from script. Bad header= <order>German Duden</order>: userInfo.pl,
referer: http://localhost/cgi-bin/

[Thu Sep 20 21:58:30 2007] [error] [client 192.168.18.13] malformed header
from script. Bad
header=\xebP\x82b\xb83\xc1\x81\xb7\x88\xe9tP\x95Y\x19\xb1\xa8\xf0\rSG\x14\x91\x88\x18\x9c#\xde\x8c:
testscript.pl, referer: http://localhost.localdomain/cgi-bin/

[Fri Sep 21 14:58:37 2007] [error] [client 192.168.18.13] malformed header
from script. Bad header=Italian</order>: testscript.pl, referer:
http://localhost.localdomain/cgi-bin/

Searching my harddrive, those strings appear in the mysql driver but we've
seen chunks of the gpl, and other weird random data in those errors.  It
almost looks like a wild pointer.

Our config looks like this:
   <FilesMatch "\.pl$">
      SetHandler perl-script
      PerlHandler ModPerl::PerlRun
      PerlOptions +ParseHeaders
      Options +ExecCGI
   </FilesMatch>

The scripts are fairly complicated, and we have no success on replicating
this outside of our environment.  Anyone have any ideas?

Mark Farver