ADL crashing with AIR 3.1 overlay

Question

Hello, I have stumbled upon a very strange issue. I've been developing an application with the AIR 3.1 overlay for a while now without any problems.
Suddenly, this morning, Flash stopped compiling my Air app. ADL is crashing every time it launches. I know "suddenly" doesn't say much but that's pretty much what happened. The strange thing is that this has nothing to do with the application I am developing. Restarting my computer, opening flash, creating a new project with the AIR template and compiling (with the project empty) still crashes the ADL.
The only thing that changed from yesterday to today is that last night I tried as a proof of concept to compile an iOS application from an old app I had, using the iOS packager in Flash CS5.5, I was able to successfully install it on my iPad and everything and I closed flash after that. This morning, nothing would compile.
I reverted AIR 3.0 to my backup of 2.6 (the one that installs with Flash) and things started compiling again. It behaves normally after doing that. I thought my SDK got corrupted somehow so I downloaded a new one from the website (here: http://www.adobe.com/products/air/sdk/) and did the overlay again, and after that it started crashing again.
Another thing is that ADL doesn't crash ONLY when AIR 2.6 is selected. Again, I created a new empty project and chose AIR 2.5. ADL crashes when testing the movie, I chose AIR 2.6, AIR for iOS and AIR for Android and it crashes every time. Reverting back to the original SDK (2.6) stops the crashing in all versions.
Is there a way I can get a crash log from ADL and post it here so we can dig more into the problem?
Thanks,
Fernando Toledo

Answer 1

Updating the post to mention how I solved it.
Kudos to Marty Pitt for finding the answer: http://stackoverflow.com/a/7909697/1098905
So, this is still a bit embarrassing for the Flash IDE. I don't know how this can get so damn corrupted but anyway. Turns out that flashbug (the firebug add on to the firefox extension) is what caused all of this. When flashbug is installed, a line is added to the mm.cfg config file of the flash player.
This file is located on a Mac in: Library/Application Support/Macromedia/mm.cfg (note this is not the user's library, is the top level Library on Macintosh HD). I don't know where this file resides on windows. The line Flashbug adds is:
PreloadSWF=/Users/martypitt/Library/Application Support/Firefox/Profiles/vxtpdg3i.default/extensions/[email protected]/chrome/content/flashfirebug/flashfirebug.swf 
When I was testing my iOS app (exporting from FLASH) I was getting a VERY strange runtime error:
TypeError: Error #1009: Cannot access a property or method of a null object reference
     at com.coursevector.flashbug::Profiler/allCompleteHandler()
Obviously I wasn't using this class so this was very very strange to me. I researched a bit and found out that there is a known bug with Flashbug: http://code.google.com/p/flashbug/issues/detail?id=32
I completely uninstalled flashbug from Firefox and that's where thing started to crash. When I found the stackoverflow post linked above I was able to find that the line was partially still there, it was like this:
PreloadSWF=
But without any parameter so ADL was crashing inexplicably every time because it probably didn't know how to parse this mm.cfg file. I deleted the line and now it works again. Don't know how the whole player debug process can break from a third party extension but this is aweful.