Not running it that high on rez. But it also happens without alt tabbing.
here is top of debug. screenie will follow
DebugMessage: Version 0.22 last updated on: Thu Sep 17 11:59:54 2009
DebugMessage: *********DXDiag info follows.*********
System Info
Time: 9/18/2009, 10:42:48
DirectX Version: DirectX 9.0c (4.09.0000.0904)
Machine Name: JEFF2
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.090206-1234)
Languages: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: OptiPlex 745
BIOS: Phoenix ROM BIOS PLUS Version 1.10 2.3.1
Processor: Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz (2 CPUs)
Physical Memory: 2046MB RAM
Page File: 836MB used, 3105MB available
Windows Dir: C:\WINDOWS
Display Info
Display device 1:
Device Name: \\.\DISPLAY1
Card Name: Radeon X1300/X1550 Series
Manufacturer: ATI Technologies Inc.
Chip Type: ATI Radeon Graphics Processor (0x7183)
DAC Type: Internal DAC(400MHz)
Key Device: Enum\PCI\VEN_1002&DEV_7183&SUBSYS_0D021028&REV_00
Display Memory: 256.0 MB
Current Display Mode: 1280 x 1024 (32 bit) (60Hz)
Monitor Name: Plug and Play Monitor
Monitor Max Resolution: 1600,1200
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.6879
Driver Date: 10/28/2008 21:22:02
DirectX Acceleration Enabled: Yes