Herb, Thank You for posting the short video which indeed shows something is going wrong. You are correct this issue was fixed in a previous release of PB.
Running tests in our lab (copying /pasting , dragging/dropping single/multiple file attachments/folders) from Brain to Brain as well as from Windows Explorer I have not been able to replicate this issue. Perhaps something is blocking the progress bar from terminating when you drag and drop into your Brain. We would be interested in seeing a copy of your output.log file after you have replicated this issue. Please email support with a copy of your output.log file.