Signal processing broken on x86_64 with version 331.20

[Matteo Panella]

lsb_release -rd:
Description: Ubuntu 12.04.4 LTS
Release: 12.04

Package version: 331.20-0ubuntu0.0.1

On precise with linux-generic-lts-raring signal processing is broken by the latest available version (331.20).
This is a known bug fixed in upstream release 331.38.

Steps to reproduce:
1. Open gnome-terminal
2. Run cat
3. Hit Ctrl-C

Expected result:
cat should get a SIGINT and terminate

Actual result:
SIGINT is never dispatched to cat and it does not terminate

As an alternative, the issue can be reproduced using VMware Player: virtual machines won't startup because vmware-vmx would get an unwarranted SIGSEGV and crash.