Visual Studio 2008 crashes after converting 2005 SSRS Project

We recently switched to SharePoint 2010 and I am updating a few reports. The .rdl files were developed in Visual Studio 2005. I am converting them to VS 2008 and deploying them to the new SP site.

Some of the reports convert just fine. Others will open very well, but when I try to open the data source or view the report, it crashes.

First, message boxes appear saying that Visual Studio has stopped working and throws this error message:

Problem signature:
  Problem Event Name:   APPCRASH
  Application Name: devenv.exe
  Application Version:  9.0.30729.1
  Application Timestamp:    488f2b50
  Fault Module Name:    StackHash_3ab9
  Fault Module Version: 6.1.7600.16915
  Fault Module Timestamp:   4ec49d10
  Exception Code:   c0000374
  Exception Offset: 000ce903
  OS Version:   6.1.7600.2.0.0.274.10
  Locale ID:    1033
  Additional Information 1: 3ab9
  Additional Information 2: 3ab916335f95035652d49d418d47682b
  Additional Information 3: 7e6c
  Additional Information 4: 7e6c28d0938d251b2561c357b5643f43

      

        
        
        
      

    

If I debug it, I get the message: "Unhandled exception at 0x7738e903 in devenv.exe: 0xC0000374: Heap corrupted."

If I click Continue, I don't get any more error messages and the task is successful (opening the data source in this case)

Any ideas on what the problem is?