I have word wrap turned on in my comments, and they're automatically formatted when I type.
If I select a block of text in my comment and delete it (either backspace or delete), it won't reformat like it does when I use backspace instead. so given the following comment:
// If the OK button was pressed, the outer controls are updated and
// the main screen is entered.
If I delete the first part of the sentence with the delete key, I come up with:
// the outer controls are updated and
// the main screen is entered.
instead of when I use backspace:
// the outer controls are updated and the main screen is entered.
This happens with either /* */ or // comments.
