Linus has released the 2.6.36-rc5 prepatch, one day later than he had intended. "Nothing really stands out. Except perhaps that Al has obviously been looking at architecture sigreturn paths, and been finding problems, and Dan Rosenberg has been finding places where we copy structures to user space without having fully initialized them yet, leaking kernel stack contents. And we had that annoying x86-64 32-bit compat syscall bug that needed fixing for the _second_ time." See the announcement for the short changelog, or the full changelog for all the details.