Windows crash using libusbk and btstack

Hello,

I did not find any bug tracker so I'm posting to this list.
When using the libusbk driver (installed using Zadig Version 2.1.0 Build 
658) and btstack [1][2], I consistently get Windows crashes (most of the 
time with no BSOD).
It works fine with the WinUSB driver.
Below is a report I get using WhoCrashed:

On Wed 11/26/2014 4:33:58 PM GMT your computer crashed
crash dump file: C:\Windows\memory.dmp
This was probably caused by the following module: libusbk.sys 
(libusbK+0x3349)
Bugcheck code: 0xA (0x8, 0x2, 0x1, 0xFFFFF800032EF971)
Error: IRQL_NOT_LESS_OR_EQUAL
file path: C:\Windows\system32\drivers\libusbk.sys
product: libusbK.sys
company: http://libusb-win32.sourceforge.net
description: libusbK(lusbk) WDF USB Driver
Bug check description: This indicates that Microsoft Windows or a 
kernel-mode driver accessed paged memory at DISPATCH_LEVEL or above.
This appears to be a typical software driver bug and is not likely to be 
caused by a hardware problem.
A third party driver was identified as the probable root cause of this 
system error. It is suggested you look for an update for the following 
driver: libusbk.sys (libusbK(lusbk) WDF USB Driver, 
http://libusb-win32.sourceforge.net).
Google query: http://libusb-win32.sourceforge.net IRQL_NOT_LESS_OR_EQUAL

Please tell me what data I can provide to help analyzing/fixing this issue.

Regards,
Mathieu Laurendeau

[1] https://code.google.com/p/btstack/
[2] https://github.com/matlo/btstack

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