SSLCertificateFile errors in Apache httpd-2.2.21

Apache 2.2.21 is out, so, being the 'on the ball' sys-admin I am, I pulled it down and rolled myself an rpm using rpm build (which I should probably make a post on later). After a few minutes of compiling, I had my spiffy rpm and I was ready to deploy it.
I first pushed it to all of our beta sites as they most closely matched our live servers and got them running in no time with a little 'rpm -Uvh httpd-2.2.21.rpm' command. After a week of that running well, I pushed it to our dev server this morning and ran into a problem... Where I previously had:

SSLEngine on
SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL
SSLCertificateFile /etc/httpd/conf/ssl.crt/secure_mysite_com.crt
SSLCertificateKeyFile /etc/httpd/conf/ssl.key/secure_mysite_com.key

in our vhost config, it no longer allowed me to start httpd. Looked in the error log and I found:

[Tue Nov 08 09:38:46 2011] [error] Server should be SSL-aware but has no certificate configured [Hint: SSLCertificateFile] ((null):0)

Of course my first response was "But I DO!". I dug around and found many places where it was defined, always correct. After paring down our long list of vhosts a bit, I was able to get one to work. Apparently it had the following lines:

SSLEngine on
SSLCipherSuite HIGH:!SSLv2:!ADH:!aNULL:!eNULL:!NULL
SSLProtocol -ALL +SSLv3 +TLSv1
SSLCertificateFile /etc/httpd/conf/ssl.crt/secure_mysite_com.crt
SSLCACertificateFile /etc/httpd/conf/ssl.crt/intermediate_bundle.crt
SSLCertificateKeyFile /etc/httpd/conf/ssl.key/secure_mysite_com.key

I don't know why I had to explicitly define my CACert on top of the others, but this made it happy and I was able to go along my way!

I found out after rolling this to a few other servers that it's also hypersensitive to Vhosts that are on port 443 but don't have ssl configs. Make sure you have the above lines or an include file with them in every vhost you have configured to run on port 443!