Today seems to my day for oddities. I just started debugging some code that I've been working on for quite some time (this is a revision for a new model number) and now the Locals window remains blank, but the rest of the debugging seems to work fine. I've re-booted the system and tried with and without the extended compiler/linker. Still nothing. I also tried running in the simulator with the same results. I tried the BLINKY example, same thing.