GinVan:
Considering that the 1.5.5 IDE was just released in early December (release notes from Nov.28), I am not sure if it is a good idea to replace the bridge.cpp file with one from a post in October or even earlier...
Good point Ralf... first day on the forum and in such a hopeful rush to solve the problem I was not observing dates. Just now I downloaded the NIGHTLY ... which I am guessing contains both the latest IDE and Bridge.cpp
The yun stalled again at 39 cycles of the above code.
I will have access to my Yun system again this weekend, I will give it a try and see what happens to me...
As for posting code, it would be a good idea if you get used to surrounding it by code "(#") tags, that makes it easier to read and to copy... 
Ralf