Is there an err_log.txt file on the watch? If so, you may want to post it. By "partial update", are you using onPartialUpdate() and "always active" (1hz) in your WF?
The log is full of code too long errors. Partial Update is confusing, sorry. The on update procedure is just stopped in the middle if the code is too long. So, I have only a part of the screen correctly displayed. There is no crash, and the onupdate code is called again on the next redraw.
