[MIKEROPHONICS]

Before anything is done to preview , Avid must make the behaviour when there is no selection to be a pref - either flash up a warning "you have not made a selection please do so , or the other state would be the one that is SO DANGEROUS to post, write to entire track. We need to be able to turn this none sense off and NOW.
Sorry Avid but what were you thinking? When people are writing software workaround a for this with the greatest of respect you need to acknowledge that you may have got it a bit wrong.

Please did this as a matter of utmost urgency before embarking on improving Preview's functionality.