Using InfragisticsSL4.Documents.Excel.v11.1, version 11.1.20111.2054

In Chrome, trying to save a spreadsheet with the same name as an open file fails (as expected) 

In IE (9) in the same situation, no exception is thrown but the file is not saved.

See the attached project for a repro.  To test, run the app

Click 'Save' and create a new file.  Open it in Excel, modify a cell and save it (to make sure it's locked).  Keep the file open in Excel

Click 'Save' again.  In chrome, an exception is thrown and the app dies.  In ie, no exception is thrown.

If you were in ie, close the spreadsheet and reopen it, the guid in A1 is the guid from the first save, not the second (still displayed in the app)  

I'd appreciate confirmation as soon as possible that this is a bug, or if someone can point out my mistake, I'll be very happy.

Thanks