When transferring files via FTP, Dopus doesn't always indicate when an error has occurred. I use public WiFi a lot, and am sometimes uploading many files in complex folder hierarchies. If the FTP upload fails, but doesn't tell me on which file, I have to look through many folders/files comparing source to destination looking for the ones where the size doesn't match. Very time-consuming to say the least.
I don't know if this is the proper place to report/request bug fixes, but I would really like to see this problem addressed.