apache2filter and apache2.0.35-dev, query_string vars missing

I've been trying to track down a bug in the apache2filter (used with Apache 2.0.35-dev) where query arguments from a GET request are not being interpolated into the php script output. Normal variables appear to work just fine. When I trace down to the actual variable value lookup and string concatenation, I see that the variable is undefined, but I'm also able to trace to where the variable is being set (not sure if they are the same hash tables or if they are merged later). Here's a little test case I cooked up: <? echo "<h1>hi foo=$foo</h1>\n"; echo "$foo\n"; ?> <ul> <? for ($i = 0; $i < 10; $i++) { echo "<li>line $i</li>\n"; } ?> </ul> Anyone else working with the apache2filter? -aaron