I just noticed that there has been a major upgrade to mbed 5.1. That seemed to have broken some of my code where I was using rtos in combination with sleep function.
In fact I just tried to load Sleep Example program, which works on the old libraries, but as soon as I update the libmdot and/or rtos libraries it fails.
It would be really nice if the example code was updated to the latest binaries as it seems quite outdated.
See here screenshot from the errors.
https://dl.dropboxusercontent.com/u/31537757/mbed.png