I usually play this game, but since two day ago with the updates, i have a fps drop when there is smoke grenade on screen.

Processor Information:
    Vendor:  AuthenticAMD
    Speed: 3200 Mhz
    4 logical processors
    4 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Unsupported
    SSE4a:  Supported
    SSE41:  Unsupported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    "Mageia 3" (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.8.8-desktop-3.mga3
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11304000
    X Window Manager:  KWin
    Steam Runtime Version:  steam-runtime-release-i386_2013-04-16

Video Card:
    Driver:  ATI Technologies Inc. AMD Radeon HD 6450
    Driver Version:  4.2.12217 Compatibility Profile Context 12.104
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x6779
    Number of Monitors:  2
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1920 x 1080
    Desktop Resolution: 3200 x 1080
    Primary Display Size: 18,74" x 10,55"  (21,50" diag)
                                            47,6cm x 26,8cm  (54,6cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: CMedia PCI

Memory:
    RAM:  3954 Mb

Miscellaneous:
    UI Language:  English
    LANG:  es_CL.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  55797 Mb
    Largest Free Hard Disk Block:  20979 Mb

Installed software:

Recent Failure Reports:
    Thu Apr 25 19:08:09 2013 GMT: file ''/tmp/dumps/assert_20130425160801_1.dmp'', upload yes: ''CrashID=bp-38a5278b-834b-4038-9f57-670872130425''