Last year I gave the same presentation (HTML5::Sanitizer) on GPW, YAPC::NA and YAPC::EU. This year I will give a different talk on every conference I attend (GPW and YAPC::EU).
I just registered "Hunting segfaults (for beginners)". This is the abstract:
Segfaults are nasty, sometimes they are hard to detect or hard to narrow down.
This beginner level talk (in regard to segfaults) will show two ways to narrow them down: Devel::Trace and core dumps plus gdb.
Thanks to my colleague plu for the idea (and research).