まさか、Apache 2.2.9 と Apache 2.2.8 の間で dso にバイナリ互換性がないとは、、、。
やられた。

新 namidame の Apache: (Apache 2.2.9)

%ldd /usr/local/sbin/httpd
/usr/local/sbin/httpd:
libm.so.5 => /lib/libm.so.5 (0x80068a000)
libaprutil-1.so.3 => /usr/local/lib/libaprutil-1.so.3 (0x8007a4000) ←！違う
libexpat.so.6 => /usr/local/lib/libexpat.so.6 (0x8008c2000)
libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x8009e5000)
libapr-1.so.3 => /usr/local/lib/libapr-1.so.3 (0x800bdf000) ←！違う
libcrypt.so.4 => /lib/libcrypt.so.4 (0x800d06000)
libthr.so.3 => /lib/libthr.so.3 (0x800e1f000)
libc.so.7 => /lib/libc.so.7 (0x800f34000)

changi の Apache: (Apache 2.2.8)

%ldd /usr/local/sbin/httpd
/usr/local/sbin/httpd:
libm.so.5 => /lib/libm.so.5 (0x800689000)
libaprutil-1.so.2 => /usr/local/lib/libaprutil-1.so.2 (0x8007a3000) ←！違う
libexpat.so.6 => /usr/local/lib/libexpat.so.6 (0x8008ba000)
libiconv.so.3 => /usr/local/lib/libiconv.so.3 (0x8009dd000)
libapr-1.so.2 => /usr/local/lib/libapr-1.so.2 (0x800bd7000) ←！違う
libcrypt.so.4 => /lib/libcrypt.so.4 (0x800cfc000)
libthr.so.3 => /lib/libthr.so.3 (0x800e15000)
libc.so.7 => /lib/libc.so.7 (0x800f2a000)