knotify4 crashed with SIGSEGV in _int_malloc()

[Marcos K]

upon starting Xwindows

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: kde-runtime 4:4.7.4-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.0.0-32.50-generic 3.0.65
Uname: Linux 3.0.0-32-generic i686
ApportVersion: 1.23-0ubuntu4.1
Architecture: i386
Date: Wed Mar 20 15:21:34 2013
ExecutablePath: /usr/bin/knotify4
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcCmdline: /usr/bin/knotify4
SegvAnalysis:
 Segfault happened at: 0xd6f369: call 0xe0f3c3
 PC (0x00d6f369) ok
 source "0xe0f3c3" (0x00e0f3c3) ok
 destination "(%esp)" (0xb609dfec) in non-writable VMA region: 0xb609d000-0xb609e000 ---p None
 Stack memory exhausted (SP below stack segment)
SegvReason: writing VMA None
Signal: 11
SourcePackage: kde-runtime
StacktraceTop:
 ?? () from /lib/i386-linux-gnu/libc.so.6
 malloc () from /lib/i386-linux-gnu/libc.so.6
 operator new(unsigned int) () from /usr/lib/i386-linux-gnu/libstdc++.so.6
 QMutex::QMutex(QMutex::RecursionMode) () from /usr/lib/i386-linux-gnu/libQtCore.so.4
 ?? () from /usr/lib/i386-linux-gnu/libQtCore.so.4
Title: knotify4 crashed with SIGSEGV in malloc()
UpgradeStatus: Upgraded to oneiric on 2013-02-18 (30 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 _int_malloc (av=0xb1700010, bytes=96) at malloc.c:4249
 __GI___libc_malloc (bytes=96) at malloc.c:3660
 operator new (sz=96) at ../../../../src/libstdc++-v3/libsupc++/new_op.cc:52
 QMutex::QMutex (this=0xb5137728, mode=QMutex::NonRecursive) at thread/qmutex.cpp:124
 QPostEventList (this=0xb5137718) at thread/qthread_p.h:110