Upgrading to the new Radeon 17.3.3 driver version causes certain particles (medigunbeam/rockets/...) in TF2 (source game in general?) te become invisible when played in DX8. Downgrading to 16.2 or playing in a higher DX version removes this problem. Certain people, including myself, prefer playing in DX8 since it is "cleaner" and improves FPS. Not a major issue, but a fix for this in an upcoming patch would be appreciated.