As usual, the Sony PlayStation Vita 1.52 Firmware update is a mandatory install. According to Andriasang.com the PS Vita update is simply another small bug fix.
To quote: "A number of Vita owners are saying via Twitter and blogs and so-forth that the update fixes a version 1.51 bug where the 3G system would not recognize your SIM card."
So far I'm unaware of any visible changes in the system or settings, however, this article will be updated as a change log becomes available on Sony's official PS Vita Web site.
System software version 1.52 for PlayStation Vita Update:
From January 16, 2012, began to update the system software version 1.52.
To become available and some features of the PlayStation Network features, updates the system software of PS Vita (Update) is required. PS Vita also system software, by updating, adding and security can be enhanced many features. Please use the update to the latest version.
The main features in system software update version 1.52:
The software system has improved the operational stability.
Finally, wololo reports (wololo.net/wagic/2012/01/16/forced-firmware-update-1-52-for-the-ps-vita/#more-3875), to quote: "Mamosuke confirmed to me today that Teck4's exploit for the PSP Emulator in the vita is still working on 1.52.
Note that it doesn't guarantee 100% that some of the techniques used to get HBL to work on top of this exploit haven't been patched, as I haven't tested myself. But for now I'm confident. I might update to test that, at some point."
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Now that we know that $ony will remove games without an exploit actually being released, can we troll them by announcing exploits for their most popular games. Eventually they will get sick of losing revenue for no reason, and will delay the time until they pull games. This would potentially give people more time to buy them in the future.
The only problem is communicating which one is real to the community without $ony knowing.