For those interested, the fix that perrin refers to above is as follows:

Found this somewhere back when this bug first appeared in mod_perl:

# work-around for mod_perl
my $tie_stdin = tied *STDIN;
untie *STDIN if $tie_stdin;

# insert open2() or open3() statement after the above
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Gerald,

It is a mod_perl bug, but I would consider putting it in the FAQ. Would probably be very helpful to people.

I started work on converting the existing code to use IPC::Run, but hadn't finished by the end of the day today .. so I may put that on hold and try this fix instead.

++beer!

Update: Added clarification in first paragraph as to the source of the fix.