Please send bug reports and feature requests to my email address, firstname.lastname@example.org.
As of version 1.3, Sync On Arrival has a "Report a Bug" wizard dialog built into it, available through the "Troubleshooting" tab in its options dialog. It asks a few question and then pre-compiles an email for you which you can review, change (if you want to) and send. The information it adds automatically is your exact Thunderbird version and the names and versions of the extensions you are using. Please use it!
BUGS I CANNOT REPRODUCE CANNOT BE FIXED. Sorry. :-/ I simply can't do anything about bugs that I can't trace back to their root cause, so I need your information to make my system behave more like yours (including the buggy behavior).