Application Validation did not succeed. Unable to continue

I'm getting this error after publishing to the server. It occurs when I test the install.
The dll in question in the manifest file on the target differs from the version I show in my references.
EXAMPLE: 1.0.3236.22091 (is source) vs. 1.0.2824.22979 in the generated manifest file on the server. The dll in question was generated from VS2003.
This seems to be isolated to my setup. If I have another developer (who was the original author of the deployed application) pull my copy from source safe, the problem goes away (for him) but I still eperience the error.
This is a Visual Basic windows application (.Net 2.0 framework)

Any Ideas as to where I might start looking?

PLATFORM VERSION INFO
	Windows 			: 5.1.2600.196608 (Win32NT)
	Common Language Runtime 	: 2.0.50727.1433
	System.Deployment.dll 		: 2.0.50727.1433 (REDBITS.050727-1400)
	mscorwks.dll 			: 2.0.50727.1433 (REDBITS.050727-1400)
	dfdll.dll 			: 2.0.50727.1433 (REDBITS.050727-1400)
	dfshim.dll 			: 2.0.50727.1433 (REDBITS.050727-1400)
 
SOURCES
	Deployment url			: file://oma-qa-iis02/c$/WebSites/INSIDEMC.COM/NoTouch/FileDistributionSetupUtility/FileDistributionSetupUtility.application
	Application url			: file://oma-qa-iis02/c$/WebSites/INSIDEMC.COM/NoTouch/FileDistributionSetupUtility/FileDistributionSetupUtility_1_0_0_119/FileDistributionSetupUtility.exe.manifest
 
IDENTITIES
	Deployment Identity		: FileDistributionSetupUtility.application, Version=1.0.0.119, Culture=neutral, PublicKeyToken=f7187e0aaf890b56, processorArchitecture=msil
	Application Identity		: FileDistributionSetupUtility.exe, Version=1.0.0.119, Culture=neutral, PublicKeyToken=f7187e0aaf890b56, processorArchitecture=msil, type=win32
 
APPLICATION SUMMARY
	* Online only application.
 
ERROR SUMMARY
	Below is a summary of the errors, details of these errors are listed later in the log.
	* Activation of file://oma-qa-iis02/c$/WebSites/INSIDEMC.COM/NoTouch/FileDistributionSetupUtility/FileDistributionSetupUtility.application resulted in exception. Following failure messages were detected:
		+ Reference in the manifest does not match the identity of the downloaded assembly EDM_DAL.dll.
 
COMPONENT STORE TRANSACTION FAILURE SUMMARY
	No transaction error was detected.
 
WARNINGS
	There were no warnings during this operation.
 
OPERATION PROGRESS STATUS
	* [11/11/2008 12:07:02 PM] : Activation of file://oma-qa-iis02/c$/WebSites/INSIDEMC.COM/NoTouch/FileDistributionSetupUtility/FileDistributionSetupUtility.application has started.
	* [11/11/2008 12:07:03 PM] : Processing of deployment manifest has successfully completed.
	* [11/11/2008 12:07:03 PM] : Installation of the application has started.
	* [11/11/2008 12:07:03 PM] : Processing of application manifest has successfully completed.
	* [11/11/2008 12:07:05 PM] : Request of trust and detection of platform is complete.
 
ERROR DETAILS
	Following errors were detected during this operation.
	* [11/11/2008 12:07:11 PM] System.Deployment.Application.InvalidDeploymentException (RefDefValidation)
		- Reference in the manifest does not match the identity of the downloaded assembly EDM_DAL.dll.
		- Source: System.Deployment
		- Stack trace:
			at System.Deployment.Application.DownloadManager.ProcessDownloadedFile(Object sender, DownloadEventArgs e)
			at System.Deployment.Application.FileDownloader.DownloadModifiedEventHandler.Invoke(Object sender, DownloadEventArgs e)
			at System.Deployment.Application.FileDownloader.OnModified()
			at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)
			at System.Deployment.Application.SystemNetDownloader.DownloadAllFiles()
			at System.Deployment.Application.FileDownloader.Download(SubscriptionState subState)
			at System.Deployment.Application.DownloadManager.DownloadDependencies(SubscriptionState subState, AssemblyManifest deployManifest, AssemblyManifest appManifest, Uri sourceUriBase, String targetDirectory, String group, IDownloadNotification notification, DownloadOptions options)
			at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
			at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
			at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension)
			at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)
 
COMPONENT STORE TRANSACTION DETAILS
	No transaction information is available.

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