So... I found a solution to be able to open Chrome on 12.04 in Incognito Mode by default (How do I make Google Chrome open Incognito by default?).
I can't seem to get it to open consistently in Incognito Mode with all the pages I have set to load on startup e.g. In OS X, I open Chrome, which defaults to Incognito Mode and loads all the websites I have set in the "Open a specific page or set of pages" preference. In Ubuntu I can't replicate that.