There was 1 corrupted update.tar.gz file.
If your *license* is set to centOS 4.4, and you updated within 24 hours of the release, then you'd need to get a new update.tar.gz (see page 1). Not all 4.4 machines use 4.4. license. Some have the 4.1 license which worked fine. Either way, all OS's will be fine now as it was quickly fixed once identified.
Also, if apache went down, then make sure you have the fixed update.tar.gz, then run the echo commands (page 1 again) to rewrite the ips.conf and httpd.conf files. You'll know if your update.tar.gz is bad by logging into DA and looking at the enhanced skin. You'll have the header repeated many times vertically.
The issue was caused by a network file system error that didn't show up as an error when compressing the the package, else the packaging system would have complained.
John