I had similar problems where things would run on the device but not on my PC with the simulator.
I did get it working for some settings in the app.icf but that was when things were still AirplaySDK and they may have changed some of the settings.
If you look up in the documenataion ASSERTIONS there is some information on turrning them off in the app.icf
I was also playing around with the [TRACE] section:
I ended up just buying a new video card that supported GLES better than the built in Intel graphics my PC came with. I tried an ATI card, didn’t work well, the NVIDIA GeForce 9400 GT card has been working with no complaints from the Marmalade simulator.