here is a 0.6.5 debug version
I corrected the timing: many times, it missed the check because of a few missing milliseconds, so that the actual check time was twice what you expected. Now, it seems to be perfect.
to get the debug messages, you need to
- add a preference in your pref.js file:
- launch Thunderbird from a terminal with console option:
Messages are output into the launching terminal. (This works on Unix and MacOS, I don't know if it's ok with Windows) (as I don't know which OS you're on).