I have a workbook with a large amount of VBA that works just fine in Excel
2003. However, when I open the file in Excel 2007 and try to "Save" or "Save
as" in any format (.xls, .xlsx, .xlsm), Excel crashes. This is the error I
get:

Problem signatu
Problem Event Name: APPCRASH
Application Name: EXCEL.EXE
Application Version: 12.0.6504.5001
Application Timestamp: 49fea693
Fault Module Name: EXCEL.EXE
Fault Module Version: 12.0.6504.5001
Fault Module Timestamp: 49fea693
Exception Code: c0000005
Exception Offset: 002b1455
OS Version: 6.0.6002.2.2.0.256.1
Locale ID: 1033

Additional information about the problem:
LCID: 1033
Brand: Office12Crash
skulcid: 1033

I have done a lot of research online, and I can see that many people have
had this same problem, but a solution still remains elusive. Can anyone help
me?

Thanks