Urs, have you tried SSE3 MB application on your computer? Looks like it might have the same type of the problem.
<core_client_version>6.4.5</core_client_version>
<![CDATA[
<message>
process exited with code 131 (0x83, -125)
</message>
<stderr_txt>
Linux optimized S@H Enhanced application by Alex Kan
Version info: SSE3 (AMD/Intel, Core 2-optimized v8-nographics) V5.13 by Alex Kan
SSE3 Linux64 Build 46 PGO, Ported by : Jason G, Raistmer, JDWhale
Processor Information:
Model: Intel Core 2 T5300, 1.73 GHz
Package: 2 Cores
Processor Caches:
L1 code cache, 32 KB
L1 data cache, 32 KB
L2 combined cache, 2 MB
Processor Features: 64bit simd [x86] cmov mmx sse sse2 sse3 ssse3 lm lahf_lm tm tm2 eist nx
Work Unit Info:
...............
Credit multiplier is : 2.85
WU true angle range is : 0.415339
terminate called after throwing an instance of 'std::bad_alloc'
what(): St9bad_alloc
SIGABRT: abort calledStack trace (18 frames):
AK_V8_linux64_sse3(boinc_catch_signal+0x17d)[0x4358ed]
/lib/libpthread.so.0[0x7f564ea6f080]
/lib/libc.so.6(gsignal+0x35)[0x7f564e720fb5]
/lib/libc.so.6(abort+0x183)[0x7f564e722bc3]
AK_V8_linux64_sse3[0x570c64]
AK_V8_linux64_sse3[0x565136]
AK_V8_linux64_sse3[0x565163]
AK_V8_linux64_sse3[0x56752a]
AK_V8_linux64_sse3[0x566f69]
AK_V8_linux64_sse3[0x590d47]
AK_V8_linux64_sse3[0x58e86b]
AK_V8_linux64_sse3[0x418fce]
AK_V8_linux64_sse3[0x4159cb]
AK_V8_linux64_sse3[0x414a14]
AK_V8_linux64_sse3[0x406074]
AK_V8_linux64_sse3[0x405612]
/lib/libc.so.6(__libc_start_main+0xe6)[0x7f564e70c5a6]
AK_V8_linux64_sse3(realloc+0x181)[0x405379]
Exiting...
</stderr_txt>
]]>