Emacs: Yanking not working when executing a macro

When recording a macro, if I perform any kind of kill (backward-kill-word), followed by a yank , the macro stops execution at the point of the yank and exits. Nothing I do seems to work to be able to actually yank 开发者_如何学Gosomething in a macro. I'm running emacs 22 on Ubuntu 9.04.

Ruby mode appears to be the culprit here. When I disable ruby mode, this works like a charm.