Who/what checks for updates to the "One-Click Install"s and how often does this occur? I’ve noticed that it seems to be “some random guy” and “eh, whenever”, at least for the MediaWiki install (there’s been a new security update out for a while at mediawiki.org, but not here, and the last security update took a while to be added too…).
One click updates are managed by DreamHost. If you have an advanced install you can install updates yourself without causing any harm. One click installs are good for quick setup, but it’s best practice to maintain the installs yourself.
Ah, okay; I thought that might confuse the Panel if I updated it myself, so I didn’t want to risk it.