Move using drag+drop in FTP

Using drag+drop to move a file to the up-dir ".." icon fails with error: Invalid access to memory.
Right click, "Move to.." works.

Session type: FTP, PORT mode
Version 4.0.7(370) (also in 4.0.4)
Interface style: NC

mail per(o)icode.se

Thanks for your post. This issue has been added to tracker.