Log Message:
Update to 31.3.0

Changelog:
Fixed Fixes an issue where using LDAP autocomplete could end up with blank \ 
entries in the compose addressing list (Bug 1045753)
Fixed Fixes an issue where IRC participants were not removed from the display on \ 
leaving a channel.
Fixed Fixes a regression where Thunderbird wasn't respecting the skip \ 
integration option on the default client dialog.
Fixed Security fixes can be found here

Fixed in Thunderbird 31.3
2014-90 Apple CoreGraphics framework on OS X 10.10 logging input data to /tmp \ 
directory
2014-89 Bad casting from the BasicThebesLayer to BasicContainerLayer
2014-88 Buffer overflow while parsing media content
2014-87 Use-after-free during HTML5 parsing
2014-85 XMLHttpRequest crashes with some input streams
2014-83 Miscellaneous memory safety hazards (rv:34.0 / rv:31.3)