Users of ubuntu natty are experiencing a sigsegv of libwebkitgtk-1.0-0 in WTF::OSAllocator::reserveAndCommit() on amd64 platforms. The original bug report was made here: https://bugs.launchpad.net/ubuntu/+source/webkit/+bug/710582 a backtrace kan be found here: http://launchpadlibrarian.net/63485933/gdb-gwibber-accounts.txt and a valgrind log here: https://bugs.launchpad.net/ubuntu/+source/epiphany-browser/+bug/704393/+attachment/1827136/+files/gwibber-accounts-valgrind.log several people can reproduce this bug. F.ex by starting up gwibber-accounts and trying to add a new twitter account. Or by using the ubiquity installer.
I think this might be a dupe. CCing Xan who should definitely know.
The trace is different, but it definitely looks like bug 42756. To double check enable overcommit and see if it stops happening (echo 1 > /proc/sys/vm/overcommit).
echo 1 > /proc/sys/vm/overcommit_memory does fix the problem!
Thanks for reporting this issue! Please refer to the earlier issue for updates. *** This bug has been marked as a duplicate of bug 42756 ***