userspace ui doesn't work with latest tuxonice-head

Hello everybody,

I have tried the latest tuxonice-head git tree and I notice that the
userspace interface doesn't work. I get this message in the logs:
 pc-francois kernel: [   48.132314] userspace ui: Failed to contact
userspace process.
I don't encounter this problem with tuxonice on the 3.3 kernel.

Does anybody knows what's happening ?
Thanks in advance for your help.