Version:           4.3.1 (using KDE 4.3.1)
Compiler:          gcc 4.3.4 
OS:                Linux
Installed from:    Debian testing/unstable Packages

Got this partial crash report (it had already crashed once before and I've restarted it with nohup in a console).

*** glibc detected *** krunner: double free or corruption (fasttop): 0xa4f834f8 ***
======= Backtrace: =========
/lib/i686/cmov/libc.so.6[0xb7e228f4]
/lib/i686/cmov/libc.so.6[0xb7e2636d]
/lib/i686/cmov/libc.so.6(realloc+0x106)[0xb7e271f6]
/usr/lib/libkdecore.so.5(kiotraderrealloc+0x24)[0xb6b89974]
/usr/lib/libkdecore.so.5[0xb6b89a16]
/usr/lib/libkdecore.so.5(kiotrader_switch_to_buffer+0x22)[0xb6b89ba2]
/usr/lib/libkdecore.so.5(KTraderParse_initFlex+0x25)[0xb6b89df5]
/usr/lib/libkdecore.so.5(KTraderParse_mainParse+0x1d)[0xb6b8935d]
/usr/lib/libkdecore.so.5[0xb6b84ef6]
/usr/lib/libkdecore.so.5(_ZN18KServiceTypeTrader16applyConstraintsER5QListI10KSharedPtrI8KServiceEERK7QString+0x44)[0xb6b83124]
/usr/lib/libkdecore.so.5(_ZNK18KServiceTypeTrader13defaultOffersERK7QStringS2_+0xde)[0xb6b8342e]
/usr/lib/libkdecore.so.5(_ZNK18KServiceTypeTrader5queryERK7QStringS2_+0x185)[0xb6b83ce5]
/usr/lib/kde4/krunner_services.so[0xa96e2c4d]
/usr/lib/libplasma.so.3(_ZN6Plasma14AbstractRunner12performMatchERNS_13RunnerContextE+0x37)[0xb7bc2797]
/usr/lib/libplasma.so.3[0xb7c382cb]
/usr/lib/libthreadweaver.so.4[0xb55034f4]
/usr/lib/libthreadweaver.so.4(_ZN12ThreadWeaver3Job7executeEPNS_6ThreadE+0xe1)[0xb5503871]
/usr/lib/libthreadweaver.so.4[0xb550248a]
/usr/lib/libthreadweaver.so.4(_ZN12ThreadWeaver6Thread3runEv+0xab)[0xb5502afb]
/usr/lib/libQtCore.so.4[0xb67f6582]
/lib/i686/cmov/libpthread.so.0[0xb50534b5]
/lib/i686/cmov/libc.so.6(clone+0x5e)[0xb7e95a5e]
======= Memory map: ========
08048000-08049000 r-xp 00000000 08:02 6326239    /usr/bin/krunner
08049000-0804a000 rw-p 00000000 08:02 6326239    /usr/bin/krunner
08394000-08bb5000 rw-p 00000000 00:00 0          [heap]
a4700000-a4800000 rw-p 00000000 00:00 0
a488c000-a4a88000 r--s 00000000 08:02 7168288    /var/tmp/kdecache-z/ksycoca4
a4a88000-a4c84000 r--s 00000000 08:02 7168288    /var/tmp/kdecache-z/ksycoca4
a4c84000-a4e80000 r--s 00000000 08:02 7168288    /var/tmp/kdecache-z/ksycoca4
a4e80000-a4f00000 r--p 00000000 08:02 6382758    /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Oblique.ttf
a4f00000-a5000000 rw-p 00000000 00:00 0
a5004000-a576e000 r--p 00000000 08:02 6636416    /usr/share/fonts/truetype/kochi/kochi-gothic-subst.ttf
a576e000-a5783000 r--p 00000000 08:02 6414507    /usr/share/fonts/truetype/ttf-gujarati-fonts/padmaa-Bold.1.1.ttf
a5783000-a5790000 r--p 00000000 08:02 6414505    /usr/share/fonts/truetype/ttf-gujarati-fonts/padmaa-Medium-0.5.ttf
a5790000-a57be000 r--p 00000000 08:02 6414560    /usr/share/fonts/truetype/ttf-bengali-fonts/MuktiNarrow.ttf
a57be000-a57d2000 r--p 00000000 08:02 6399182    /usr/share/fonts/type1/gsfonts/n019003l.pfb
a57d2000-a6475000 r--p 00000000 08:02 6415169    /usr/share/fonts/truetype/wqy/wqy-zenhei.ttc
a6475000-a6501000 r--p 00000000 08:02 6382662    /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf
a6501000-a66fd000 r--s 00000000 08:02 7168288    /var/tmp/kdecache-z/ksycoca4
a66fd000-a66fe000 ---p 00000000 00:00 0
a66fe000-a6efe000 rw-p 00000000 00:00 0
a6efe000-a6eff000 ---p 00000000 00:00 0
a6eff000-a76ff000 rw-p 00000000 00:00 0
a76ff000-a7700000 ---p 00000000 00:00 0
a7700000-a7f00000 rw-p 00000000 00:00 0
a7f00000-a7ff8000 rw-p 00000000 00:00 0
a7ff8000-a8000000 ---p 00000000 00:00 0
a8022000-a8023000 ---p 00000000 00:00 0
a8023000-a8823000 rw-p 00000000 00:00 0
a8823000-a8824000 ---p 00000000 00:00 0
a8824000-a9024000 rw-p 00000000 00:00 0
a9024000-a902d000 r-xp 00000000 08:02 5343715    /lib/i686/cmov/libnss_nis-2.9.so
a902d000-a902e000 r--p 00008000 08:02 5343715    /lib/i686/cmov/libnss_nis-2.9.so
a902e000-a902f000 rw-p 00009000 08:02 5343715    /lib/i686/cmov/libnss_nis-2.9.so
a902f000-a9044000 r-xp 00000000 08:02 5343711    /lib/i686/cmov/libnsl-2.9.so
a9044000-a9045000 r--p 00014000 08:02 5343711    /lib/i686/cmov/libnsl-2.9.so
a9045000-a9046000 rw-p 00015000 08:02 5343711    /lib/i686/cmov/libnsl-2.9.so
a9046000-a9048000 rw-p 00000000 00:00 0
a9048000-a904f000 r-xp 00000000 08:02 5343705    /lib/i686/cmov/libnss_compat-2.9.so
a904f000-a9050000 r--p 00006000 08:02 5343705    /lib/i686/cmov/libnss_compat-2.9.so
a9050000-a9051000 rw-p