I'm using Flex, working with the 0.9.1 version of the SDK and the only version of the simulator released thus far. Using Flash Builder 4 (not burrito), I find that I cannot get the debugger to connect, although it seems as if I was able to at one time. At any rate it won't stop on a breakpoint for me, or output a trace to the console, making it a big pain to troubleshoot.
If I launch the app from the debug button, it is apparently able to launch the debug player and not the regular player inside the simulator.
If there is a fix for this, I'd love to hear about it, but otherwise, if others are in the same boat, just remember that the regular player in the simulator will not throw up an player error dialog, you have to run in debug mode to get the error dialog. It is back to the old days of Flash silently failing.
-=Cliff>
[UPDATE]: I figured out what happened, and this might easily happen to others. My IP Address changed between the time the project was created and now. I just changed routers, and on my old router, it devoted specific IP addresses to each of my machines by mac address. This new router is just running a normal DHCP lease and giving me a number from the pool whenever it runs out.
SO, word to the wise: if your debugger stops working, first step is to look in your project's debug launch profile, and make sure that your debug host IP matches your machine's current IP
