For once I'm going to track these bugs _before_ someone commits it in ~arch without notice.
The main problem is going to be with the fact that now the "present but cannot be compiled" warning will accept the result of the compiler rather than just the presence as it did before. Check out http://blog.flameeyes.eu/2009/02/04/brace-for-impact for details about the issue if you wish.
I'll see to open bugs later on today.
2.65 is stable now, so not much left to do here