Not to be outdone by the beta channel, Chrome OS dev channel has been updated to 0.10.156.1. Unlike the beta channel, Google didn't give post release details to their blog for the dev update. However it stands to reason that the same kernel security issue fixed in the dev update has been fixed. Also, some users on various forums are reporting that a Chrome Sync issue that started with 0.10.146.1 has been resolved in 0.10.156.1. If Google updates their blog with details of the update, I'll update this entry so keep your eyes peeled.
Meanwhile, if you've installed 0.10.156.1, be sure to share your experiences in the comments.
Update: Edgar pointed out in the comments that in this version, if you press the dim button above the 7 and 8, the screen will dim all the way down to completely turning off, a good way to save power if you're just listening to audio or using an external display.