The warning should occur only if the file previously existed on disk before the IDE got its hands on it.

Well, it might be that you're saving in plain text format, which is different than format assumed by default - i.e. sc code format. In that case you do need to re-open the file, to drop syntax highlighting and such.

This warning is simply being generic, to never warn too little, at the cost of sometimes warning too much.

Note step 3, in which I did give a file extension scd.

I retested and confirmed that the file type chosen in the save dialog's type menu is scd, matching the extension, putting this in the category of warning too much :-)

I retested and confirmed that the file type chosen in the save dialog's type menu is scd, matching the extension, putting this in the category of warning too much

Yes, that's what I meant - I agree it warns once too much here. I should have said "You could have been saving..." instead of "it might be that you're saving...".

fixed. we should not warn when saving unnamed files as .sc and .scd files