Update...for me, special characters in the password turned out not to
be the problem after all.
I can reproduce the following scenario. If anyone else can also,
perhaps it will be a clue for webmail author.
Config
-Use add-ons: hotmail-1-2-19b45.xpi and web-mail-1-3-3b3.xpi
-You will need two Thunderbird profiles
-Use the add-on ProfileSwitcher 0.3.4.1
Assumption
-There are no other issues, add-on or otherwise, that are blocking
your sync from Tbird to hotmail
Steps
1. Close all running Thunderbird processes
2. Start the Thunderbird profile that uses the hotmail add-on
3. Assuming you are having success in general with
hotmail-1-2-19b45.xpi, test and confirm you sync with hotmail
4. Leaving the first (hotmail using) thunderbird profile open, use the
ProfileSwitcher to open a second instance of Thunderbird (note: my
second profile does not contain or use the hotmail add -- I do not
know if this is a necessary condition)
5. Test and confirm the (previously successful) hotmail-using profile
can now NOT connect to hotmail
6. Close the second thunderbird profile/instance
7. Test and confirm the hotmail-using profile can again connect to
hotmail
This works for me whether I use special characters in my password or
not. So far, anyway...got my fingers crossed. :)