I am working at a new client site today. They are a manufacturer and have to send out an inventory list every morning to their customers.
They have a .rpt file that they click on, Crystal Reports v8.5 opens
They click on the RUN icon and the report runs fine
They click on the EXPORT icon and select:
DESTINATION: DISK FILE
then click OK
The choose export file dialogue box opens with the file name shown below.
When they click SAVE, the following is displayed:
Visual Studio Just-In-Time Debugger
An unhandled WIN32 exception occurred in CRW32.exe 
New Instance of Visual Studio 2005
This only happens on 5 of 12 reports. The rest create the file with no problems.