Elgg Core Ticket #607 and orphaned files

Does anyone know if Elgg core trac ticket #607 and the related fix is covering the issue of orphaned files? i.e. you delete a user, but their files are left behind and visible in the "All sites files" view. These files are not attributed to any user. If you click on the file, a blank page is displayed.

I also can't tell where this fix is being applied - so is this part of Elgg 1.7?

Thanks.