Ok, so Adblock AND Flashblock indeed work with this build, BUT not at once.

After installing the SVN, I uninstalled both apps, rebooted, installed one at a time and rebooted once again in between installs.

From what I've seen, ABP does not initialize at the start all the time. I bookmarked the config "chrome://adblockplus/content/config.html" and it seems if I open that and refresh the subscription, it kicks in the ABP.

Ads get blocked, but it seems at the expense of smoother scrolling.

If you want to use FB, just disable ABP or don't install it at all. You will also need to restart the browser TWICE. It will obviously block some of the ads that are flash based (some on this site). And, scrolling speed is not sacrificed.