Lightroom :: Crash In Develop Module RAW Files With Sidecar Files

The issue probably has to do with the differences in settings. I am using the 64 bit version of Windows 7.I imported a group of pictures with the XMP sidecar files generated with Lightroom v3.  All the image files, a mixture of Canon Mark 5D II RAW and jpg files from my point & shoot UFO camera, imported without issue picking up all my tagging and GPS settings. When importing you are put into the Library module and from the Library module I could click on any RAW or jpg file, look at the meta data and view full screen.
 
I then entered the Develop module with a jpg picture selected and none of my settings made it across. The process was set to 2012.  I was able to try out the new adjustments and all worked very well.I then selected a RAW file while still in the Develop module and all hell broke loose.
 
I got a tip window pop up, the film strip went orange, the rest of the app screen then became greyed out and then behind tip pop up a crash window containing this information appeared:

Problem signature:
Problem Event Name: APPCRASH
Application Name: lightroom.exe
Application Version: 4.0.0.1
Application Timestamp: 4ef2621d
Fault Module Name: MSVCR100.dll
Fault Module Version: 10.0.40219.1
Fault Module Timestamp: 4d5f034a
Exception Code: c000041d
Exception Offset: 000000000003c1be
[code]....
 
There was no other path but to have the app close after that.  Now since Lightroom has left off with the RAW file in the develop module when I restart the app it starts in the develop module with that same RAW image selected and I crash before I can change to a jpg.   I am probably going to have to delete and recreated the data file to use the app again
 
After the all this I went back and checked to see how I had the catalog settings in LR 3 set because there were no sidecar files for the jpg images.  I did not have the option to write settings to jpg and tif files but did have write settings to sidecar set.  So I have a bit of a mystery why I have no sidecar files for jpg files when I should have based on the way the settings were.  This probably explains why I had no issues at all with them in LR 4.
 
I am going to get LR 4 working again and then import the same batch of pictures without any sidecar files and see if I have any issues.  I will report back soon.