[tor-relays] tor died with "invalid opcode", should I be worried?

Using Tor 0.2.2.35 (git-4f42b0a93422f70e), OpenSSL 0.9.8o:

Jan 12 21:17:25 XXXXXXX kernel: [ 4257.857564] tor[1909] trap invalid opcode ip:7fa7dd61f8f7 sp:7fa7daf80400 error:0 in libcrypto.so.0.9.8[7fa7dd574000+175000]

I don't have a core dump unfortunately. This box has had some stability issues lately (still unknown if hardware or DoS attacks are to blame), but I'm a bit worried about a possible exploit attempt. Has anyone else observed such Tor crashes recently?

OpenSSL 0.9.8o has a few vulnerabilities according to http://www.openssl.org/news/ but this is Debian Stable *sigh* ...

Regards, Marinos