It can't work 3.55 Firmware don't include the necessary driver to recognize the PS Vita, etc...
4.11 with a flasher will change anything because anyway you can't install PS Vita app that is not properly sign with your unique ID PS Vita Account, etc..
When you install a PS Vita App with the PS3, the PS3 go under a special mode that you don't have anymore access to the PS3 XMB, you control everything with the CMA Lite task background of the PS3 and the CMA from the PS Vita, it's more the PS Vita control the transfer than the PS3, the PS3 only call the PS Vita system to install PS Vita APP, kernel call to the PS3 system that lets you to control PS3/PS Vita transfer file.
If you talk about unit13, it's not a problem of a fail it's just the 3D engine need more optimisation, fix some memory access for decompressing textures, shaders,
About the USB Debug mode they can't fix, i was starting to making a pastebin with more explain about the PS Vita/Debug why it can't be fixed and why it's useful. i'm sure that have already many dev who know how to exploit it (the PS Vita = A smartphone)
I didn't check all but it seems that Netflix have also a similar problem (probably because the App was release a little bit too fast without checking everythings)
I'm pretty sure he was saying about the update of the PS Vita that for sure don't need that much security that already have, about the stuff of the SEN Store and Vita Game Card is different the Vita Card (memory card) it's a Micro m2 + Encryption (not sure if is the best but that go to far for me) nothing else than that but the Encryption is generated by the PS Vita system and save your Unique ID in cache that when you install a game or app you can only launch that with your system.
Actually is not the PS3 decrypt the PS Vita App, it's the PS Vita system when is connected to the PS3 system the PS3 system = Host
Now about the dump the keys, it's not my job i try to offer more than that, like i said dualboot/bootstrap and also a alternative app that you can use under Linux/MacOS to exploit the PS Vita more easily i'm not here yet but i have the more important to exploit it.
Take a look to my last pastebin that i hope will let you understand more http://pastebin.com/hU1M9eWH
PS Vita ARM Debug Explain.
Probably some dev already know that but it's good to explain why we can go under Debug mode on the PS Vita that don't change that much than a Smartphone with ARM Architecture.
ARM CPU include a Debug mode and Monitor Mode (related to the Embedded)
As you probably know the Debug mode of the ARM, let you have a full control of the CPU, System Execution, Software, etc...
The Monitor Mode (related to the Interface) let you control some part of the system software in real-time (RTOS)
About the debug mode that use a breakpoint exception (remember USB is a external signal) that let you to use the external signal (hw,data breakpoint, enter debug and act debug state) the CMA use Monitor Mode to let you control the transfer file to your computer or PS Vita but with some limitation on the software and hardware access restricted
The instruction is stocked in a sequential memory of the PS Vita system, that if you use a breakpoint -> you read/write the memory
Take a look to this excellent pdf of ARM Cortex-A9 (CPU of the PS Vita) http://infocenter.arm.com/help/topic/com.arm.doc.ddi0407g/DDI0407G_cortex_a9_mpcore_r3p0_trm.pdf
Reason why i was talking about the CMA, the debug execution and the IOCTL call
Add this to all my last pastbin log execution (CMA, etc)
Also another one ;) http://infocenter.arm.com/help/topic/com.arm.doc.dui0440b/DUI0440B_realview_platform_baseboard_for_cortexa9_ug.pdf