only gMo and TF2 ha changelogs.
gMod fixed like, one exploit, and TF2 had the big halloween event (SO FUCKING EXCITED!!!)
still nothing about css though...hmmm
edit: here you go. from changelog of TF2
Engine (CS:S, DoD:S, TF2, HL2M)
Removed the rate limit for the "status" command when entered into the server console
Fixed an exploit that allowed people to send fake server messages to clients
Significantly improved engine vertex compression (large reduction in per-model memory usage)