random crashes

[ryutenchi]

i've had 3 random crash in the past 20-30 mins here are the crash_backtraces of the first 2:
crash_backtrace_7550.log:
libs/libcore_client.so(_ZN10ClientBase14save_backtraceE v+0x7e) [0xf7dced5e]
libs/libcore_client.so(_ZN10ClientBase12client_crashEi+ 0x17) [0xf7dcf107]
[0xffffe500]

crash_backtrace_7624.log:
libs/libcore_client.so(_ZN10ClientBase14save_backtraceE v+0x7e) [0xf7e13d5e]
libs/libcore_client.so(_ZN10ClientBase12client_crashEi+ 0x17) [0xf7e14107]
[0xffffe500]
/lib32/libc.so.6(memmove+0x4d) [0xf7118e1d]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/32/libstdc++.so.6(_ZNSs9_M_mutateEjjj+0x176) [0xf72912f6]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/32/libstdc++.so.6(_ZNSs15_M_replace_safeEjjPKcj+0x3a) [0xf729137a]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/32/libstdc++.so.6(_ZNSs6assignEPKcj+0x55) [0xf7291415]
libs/libentity_system.so(_ZN6Entity22input_message_inte rnalEP7Message+0x3b2) [0xf75f1952]
libs/libentity_system.so(_ZN14ThreadedEntity24internal_ thread_callbackEv+0x7c) [0xf7624cec]
libs/libentity_system.so(_ZNK4sigc15adaptor_functorINS_ 18bound_mem_functor0Iv14ThreadedEntityEEEclEv+0x26 ) [0xf7627906]
libs/libentity_system.so(_ZN4sigc8internal10slot_call0I NS_18bound_mem_functor0Iv14ThreadedEntityEEvE7call _itEPNS0_8slot_repE+0x20) [0xf7627930]
libs/libos.so(_ZN13ThreadedClass11thread_procEv+0x1ae) [0xf74aba2e]
libs/libos.so(_ZN13ThreadedClass20generic_posix_threadE PS_+0x1c) [0xf74ab36c]
/lib32/libpthread.so.0 [0xf6dc34ab]
/lib32/libc.so.6(__clone+0x5e) [0xf716bafe]


the 3rd one said it dumped... but the file wasn't there...