Not that i use this much, but I notice that in v3.21 the checkboxes for Wipe Alternate Data Streams and Wipe Cluster Tips in Secure File Deletion are now unchecked by default, the opposite to what I believe they were on the previous release. Rather more annoying is that if they are selected then as soon as Normal File Deletion is selected then these checkboxes are cleared, so you have to set them again when you return to secure file deletion.
I would have thought that checked would be the default for these options, or not even give the chance to choose, as you could say that secure file deletion is more complete with these options.