If I create a new blank file from template: File->New Using Template-> (Select Any Template)
then I try to close the window without having done anything to it, I get a popup dialog box saying:
You are about to overwrite your Rhino V4
file as a Rhino version 5 file.
Use File > Export to save this file as a V4 file
Cancel Save As V5
If I click cancel and then try to close the widow again I get the same popup message again.
If I Alt-Tab way and then return to Rhino I then can close the widow normally. That is the save dialog box comes up and I can select Don’t Save.
I also cannot Alt-Tab back to Rhino if the above message is being displayed. I have to have pressed cancel to close the dialog box, then Alt-tab away then return and then close the window.
Oh yeah this is with the new build 2014-04-07. I did not have this problem with the previous build.