The buffer overflow bug was something I had been experiencing for a while, it would cause my client to crash, glad to see that has been fixed.
Core is still randomly crashing for me from time to time, but I think that is because I run it on a very old system. I have not been able to pinpoint the cause of most of my crashes, and the log file doesn't give any clues.
Can you give the specs of your machine? I run a node on my old laptop with 4GB of ram. Still runs on 0.11 but no crashes or whatsoever.
Laptop specs in case you're wondering:
AMD Phenom II N620 2.8 Ghz
AMD Mobility Radeon HD4250
4 GB of ram and a 320GB HDD
If yours is greater, I suspect a faulty memory in that case.