Terry,
Thanks for the help.  Understanding that what I'm seeing is not normal is very good information.
Mike,
First, my apologies for the poorly written bug report.   I'm a professional software developer.  My bug report should have been much higher quality.   Here's what it should have looked like:
Expected Results: When I double-click an image to open the QU Editor window, the QU Editor window opens and can be moved to any window.
Actual Results: When I double-click an image to open the QUEditor window, it always opens in my secondary, uncalibrated monitor. 
Repro Steps:1) Ensure that Windows Auto Arrange is ON in "Control Panel > All Control Panel Items > Ease of Access Center > Make the mouse easier to use".   See "Windows Auto Arrange" below for detailed repro steps for setting this.
2) Open QU in primary (calibrated) monitor.
3) Double-click on an image.
4) QU Editor pops up in secondary (uncalibrated) monitor.
5) Drag QU Editor window from secondary (uncalibrated) monitor to primary (calibrated) monitor.  
QU Editor snaps back to secondary (uncalibrated) monitor.If you repeat the process, but move QU to the secondary window and then double-click on an image, the QU Editor STILL opens in the secondary window. 
Comments and Further Testing:  On a hunch, I tried setting and resetting the Windows Auto Arrange feature: 
1) Set Windows Auto Arrange to "
OFF" and retest.   Results: When the image is double-clicked, the QU Editor window opens in the location where it was last closed.   Then the QU Editor Window can be dragged to the left or right monitor.   
2) Set Windows Auto Arrange back to "
ON" and retest.   Results: When the image is double-clicked, the QU Editor window opens in the location 
where it was last closed.   However, it can NOT be dragged to another monitor.     
It looks like the issue is related to the Win7 Windows Auto Arrange feature.   Since this is a nice feature that is valuable to me, I don't want to shut it off.   The way this works normally is when a window is "auto arranged" you can unlock it by clicking and dragging.  The QU Editor doesn't do this, so I believe this is a bug.
I did find a short term workaround - Turn off Windows Auto Arrange, set QU Editor to open in the primary (calibrated) window, and then turn Windows Auto Arrange back on.   The QU Editor is still permanently locked to a monitor and can't be moved, but at least it's the calibrated monitor.
Please take a look at this.
Thanks,
Dan.
Windows Auto Arrange - To set Windows Auto Arrange ON: 1) Open Control Panel.
2) Change to “View by” Large icons (or Small icons).
3) Then click “Ease of Access Center > Make the mouse easier to use”.
4) Scroll to the “Make it easier to manage windows”.
5) Ensure that the “Prevent windows from being automatically arranged when moved to the edge of the screen” is UNCHECKED.
Basic System Information: - QU - the latest version (v2011.118)
- Computer - Win7 Pro x64 running on a Core i7/920 with 12GB of memory.  
- Video subsystem - The video card is a PNY nVidia 4000 with 2GB of memory.   The video card connects to a calibrated NEC PA271W via DisplayPort and to an uncalibrated Samsung 2443 via DVI.
- Below are two key sections from the "System Information" analysis.  If you want the entire 3500 line file, I can PM that to you.
System Information Analysis:------------------------------------------------------
System Information report written at: 03/08/11 08:25:41
System Name: xxx
[System Summary]
Item   Value   
OS Name   
Microsoft Windows 7 ProfessionalVersion   
6.1.7601 Service Pack 1 Build 7601   Other OS Description    Not Available   
OS Manufacturer   Microsoft Corporation   
System Name   xxx   
System Manufacturer   System manufacturer   
System Model   System Product Name   
System Type   
x64-based PC   Processor   Intel(R) Core(TM) i7 CPU         920  @ 2.67GHz, 3800 Mhz, 4 Core(s), 8 Logical Processor(s)   
BIOS Version/Date   American Megatrends Inc. 0301, 11/2/2009   
SMBIOS Version   2.5   
Windows Directory   C:\Windows   
System Directory   C:\Windows\system32   
Boot Device   \Device\HarddiskVolume2   
Locale   United States   
Hardware Abstraction Layer   Version = "6.1.7601.17514"   
User Name   xxx   
Time Zone   Pacific Standard Time   
Installed Physical Memory (RAM)   12.0 GB   
Total Physical Memory   12.0 GB   
Available Physical Memory   7.41 GB   
Total Virtual Memory   30.0 GB   
Available Virtual Memory   24.8 GB   
Page File Space   18.0 GB   
Page File   D:\pagefile.sys   
Name     
NVIDIA Quadro 4000   PNP Device ID   PCI\VEN_10DE&DEV_06DD&SUBSYS_078010DE&REV_A3\4&2F1C4782&0&0018   
Adapter Type   Quadro 4000, NVIDIA compatible   
Adapter Description   NVIDIA Quadro 4000   
Adapter RAM   (2,147,483,648) bytes   
Installed Drivers   nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um   
Driver Version   8.17.12.6717   
INF File   oem74.inf (Section009 section)   
Color Planes   Not Available   
Color Table Entries   Not Available   
Resolution   Not Available   
Bits/Pixel   Not Available   
Memory Address   0xF8000000-0xFBBFFFFF   
Memory Address   0xD8000000-0xDFFFFFFF   
Memory Address   0xD4000000-0xDFFFFFFF   
I/O Port   0x0000BC00-0x0000BC7F   
IRQ Channel   IRQ 24   
I/O Port   0x000003B0-0x000003BB   
I/O Port   0x000003C0-0x000003DF   
Memory Address   0xA0000-0xBFFFF   
Driver   c:\windows\system32\drivers\nvlddmkm.sys (8.17.12.6717, 12.37 MB (12,967,528 bytes), 3/4/2011 11:42 PM)