Weird Outlook 2010 problem. Duplicate emails display (but actually not)

[AJ Dual]

I have a user with three monitors. Two on DisplayPort running in portrait orientation he uses for market/trading software, the third is landscape and he leaves his MS Outlook open in it.

His email messages will duplicate over and over, except it's just the header info, From, Subject, Recieved, Size etc. that duplicates. Underneath each is it's own unique email. Closing/reopening Outlook makes it go away for a few minutes.

The interwebz and MS support/MS K-Base articles are of no help.

Searching everything/anything even close to "duplicate messages display Outlook" gets results for actual duplicate messages, PDA/phone synch issues, using a POP3 server with an ISP, or .OST corruption. Nothing about when it's just this display corruption for a user on the Exchange server, and the messages underneath are still unique. 

After my team got desperate, we finally tried switching around the users monitors and putting Outlook and the horizontal monitor onto DVI from the DisplayPort solved it for about a month, then it came back. So maybe it just spontaneously resolved itself and it solved nothing.

Has ANYONE else seen this issue?

OST has been scanned/repaired, no change. Office/Outlook 2010 has been completely uninstalled and reinstalled.

I'm ready to just rip out his ATI video cards and replace them with Nvidia based ones just to see if completely different video/drivers fixes it.

[fifth_column]

I've seen something like that with Outlook folders being duplicated.  It was because of a mobile device, in this case a blackberry.  Anyway, MS has a utility that you might find useful:

http://mfcmapi.codeplex.com/

I assume you've rebuilt both the Outlook and windows profile, changed to a basic windows theme (not aero), and messed around with the windows performance settings.  As well as verifying it happens even when less than three monitors are attached, and doesn't happen when the user is logged into a different PC altogether.

[AJ Dual]

I've seen something like that with Outlook folders being duplicated.  It was because of a mobile device, in this case a blackberry.  Anyway, MS has a utility that you might find useful:

http://mfcmapi.codeplex.com/

I assume you've rebuilt both the Outlook and windows profile, changed to a basic windows theme (not aero), and messed around with the windows performance settings.  As well as verifying it happens even when less than three monitors are attached, and doesn't happen when the user is logged into a different PC altogether.

Yes, we did that too. And the duplicate clean-up tool/MAPI explorer won't work, since there aren't any actual duplicate emails. Just the list in the inbox falsely shows duplicate headers but when you go into them, they're still their own distinct individual emails.

And it's only happening in the multiple monitors. So I think/hope just switching out the video cards and drivers will work, but was wondering if there was just some stupid registry key or whatnot from someone had run across this particular issue. 

[fifth_column]

Why didn't you say so?

Go to:  HKLM\SW\MS\Windows\Current Version\Outlook

Remove the "Display duplicate entries that piss off AJ" value . . .

 

[AJ Dual]

Why didn't you say so?

Go to:  HKLM\SW\MS\Windows\Current Version\Outlook

Remove the "Display mislabeled duplicate entries that piss off AJ" value . . .

 

Is that a DWORD value, or what?