I started using the APC Object Cache. I have APC version 3.1.3p1 and PHP 5.3.2 installed, as well.
Problem is, it works for about 5 minutes and then start throwing "potential cache slam averted" messages to my error logs. However, it may have "averted" something, but all it has done is caused my WordPress install to throw blank screens.
Uninstalling the plugin fixes the issue.