I have an update to this problem. I re-installed a fresh version of RR 11.01.2012 build, then a fresh copy of DFX 5.1.2, then installed all updates to DFX (via default Menu 4 button). Everything was fine with the Weather screen until I tapped the 'Reload Weather' button. It spews out the same gobbledy-good speech. I have noticed the speech repeated is the same. It is spoken so quickly that I can't quite make out what it is saying, but it appears to be spelling out something (presumably the text does not match any word, so it is spelling it out).
I've also noticed when I close RR that it speaks "kill winamp"
Is there a way to disable RR speaking hidden text? Perhaps that would solve the problem.