Patches to 3.11pre4?

I saw this on the linux ISP mailing list:

>        Make sure you get on the mailing list to pick up the one or two
> important patches to version 3.11-pre4 which fix a transient problem with
> the subscribe mechanism. BTW, its the only problem I've ever had with the
> software. Its as solid as procmail, which is pretty solid these days.
What are these "important patches" and where do I get them??

Thanks,
davidt(_at_)mcs(_dot_)net(_dot_)au