[Catch 23]

Try this:

1. Set Word to flag multiple spaces after a full stop.

2. Type three sentences.

3. Insert a second space after the period at the end of the first
sentence. Word should flag it with a green wiggly underline.

4. Place the cursor between the two spaces and press Delete. Word
continues to flag the error that is no longer there.

5. Retype the period. The error flag goes away.

This does not occur if the extra space is deleted using backspace or
if the first space is deleted.

Did anyone with a pulse test this thing?