patch 7 for me, is stuttering too, before patch 7 I never had a problem..but now I do, it runs solid 65 - 74fps full graphics, patch 7 arrives and I have stuttering.  

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System Information
------------------
Time of this report: 8/26/2009, 16:29:26
       Machine name: JONATHAN-PC
   Operating System: Windows Vista™ Home Basic (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.090302-1506)
           Language: English (Regional Setting: English)
System Manufacturer: XFX78I
       System Model: XFX nForce 780i 3-Way SLI
               BIOS: Phoenix - AwardBIOS v6.00PG
          Processor: Intel(R) Core(TM)2 Duo CPU     E8500  @ 3.16GHz (2 CPUs), ~3.2GHz
             Memory: 2814MB RAM
          Page File: 1243MB used, 4595MB available
        Windows Dir: C:\Windows
    DirectX Version: DirectX 10
DX Setup Parameters: Not found
     DxDiag Version: 6.00.6001.18000 32bit Unicode
------------
DxDiag Notes
------------
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
        Sound Tab 3: No problems found.
          Input Tab: No problems found.
--------------------
DirectX Debug Levels
--------------------
Direct3D:    0/4 (retail)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)
---------------
Display Devices
---------------
        Card name: NVIDIA GeForce 9800 GTX/9800 GTX+
     Manufacturer: NVIDIA
        Chip type: GeForce 9800 GTX/9800 GTX+
         DAC type: Integrated RAMDAC
       Device Key: Enum\PCI\VEN_10DE&DEV_0612&SUBSYS_059210DE&REV_A2
   Display Memory: 1653 MB
 Dedicated Memory: 501 MB
    Shared Memory: 1151 MB
     Current Mode: 1440 x 900 (32 bit) (75Hz)
          Monitor: Generic PnP Monitor
      Driver Name: nvd3dum.dll,nvwgf2um.dll,nvwgf2um.dll
   Driver Version: 8.15.0011.8618 (English)
      DDI Version: 10
Driver Attributes: Final Retail
 Driver Date/Size: 6/10/2009 06:03:00, 7611904 bytes
      WHQL Logo'd: Yes
  WHQL Date Stamp: 
Device Identifier: {D7B71E3E-4552-11CF-C452-992502C2C535}
        Vendor ID: 0x10DE
        Device ID: 0x0612
        SubSys ID: 0x059210DE
      Revision ID: 0x00A2
      Revision ID: 0x00A2