I don't know if anyone else has had these problems but since updating to sdk 1.2.2 I can't just rerun my wathface in the simulator to see the changes I've made. I have to close the simulator, clean the project and then re run the watchface. Even then the changes aren't visible sometimes.
The other thing I've noticed is that custom fonts are more spaced apart. It's not responding to negative xoffset so my custom font has gone all over the place.
It's getting frustrating to develop with this platform, specially if you bare in mind the return of investment we, the developers, are getting for our countless hours of dedication.