I'm having problems with 12.10 and 13.04 regarding Steam (specifically Team Fortress 2 game) which at some random point I will experience a fps drop, something like from 200 to 10. I'm not sure but this could be a memory leak because the whole system gets slow afterwards, only a reboot to fix (sometimes a lightdm restart).
I even created a thread on Steam Linux Discussions reporting how to fix it on 12.04.1 by manually upgrading the kernel to 3.5.0-25 (Link HERE), but somehow if the kernel comes with the system (like on 12.04.2/12.10/13.04) the problem still persists.
I love 13.04 and 12.10, but I can't see any major differences in performance or anything else, just in their repositories (12.04 has "older" versions of the majority of programs out there). So, what makes 12.10/13.04 better than 12.04?