Just an FYI in case folks aren't reading deep in the threads.
Thanks to prompt and complete bug reports by a number of users (<oops>) I've discovered there was a bug in the released 1.4 code.
1.4.1 fixes it - the symptom is every time you try to publish your access_token gets invalidated.
Everyone should take this update.
If you have further other problems with 1.4.1 please do start threads in this forum.