You will need to update your firmware to the latest version. Edison - Software Downloads
This was a problem in the UART in edison-weekly_build_56_2014-08-20_15-54-05
to check your version issue cat /etc/version at the console
After flashing with the ww42 firmware update your version will be edison-rel1-maint-weekly_build_16_2014-10-14_14-56-19
You can find the documents on flashing your Edison
No, we don't have access to the bug list per se, that would be the forum.
The Software & Documentation section contains some of changes addressed in the Edison HG.
Has your char dropping issue been fixed?