This error occurs at the bottom of every PHP-parsed page:

"Fatal error: Nesting level too deep - recursive dependency? in Unknown on line 0"

The pages seem to render okay, but the error appears to end each page.  It even spit out the same error dozens of times on make test, and after sending in the test results.

./configure  --with-apxs=/usr/local/apache/bin/apxs  
 --enable-trans-sid
 --enable-track-vars
 --with-gd
 --with-pdflib
 --with-jpeg-dir  
 --with-tiff-dir
 --with-pspell
 --with-freetype-dir
 --enable-gd-native-ttf
 --with-png-dir 
 --with-zlib-dir
 --with-ttf
 --with-mysql=/usr/local/mysql

The system is MDK9 and Apache 1.3.26