The patch brought two changes--"Performance improvement for dual and quad core systems" and "Friends fix for join in progress and Friends tab in server browser." A quick browse of the Steam forum finds that some are reporting Cod Blops is now running peachy for them, while others are less lucky.
Developer Treyarch's community manager Josh Olin has issued an update on PC patch progress, noting that the following issues are still being worked on:
- GPU hitching on certain graphics cards.
- Incomplete server browser results.
- Improvements to Quickmatch joins (results with better ping and reduced lag).
- Zombies "The game session is no longer available" error.