php_flag zlib.output_compression on
php_flag zlib.output_compression off
Great suggestions. Please file an improvement ticket in JIRA. Thanks!
I found that one of my directories was set incorrectly, if any of the directories listed is incorrect the install will list all as having problems.
Maybe the MODx team could update the install process at some point in the future to list only the effected directory as this could help with all installs.