When uploading files to ftp server via cyberduck, after update to 3.8, it shows filesize always with 4,0 (or 4,1) GB. But I was uploading a 48,0 MB file. I tested various files with different sizes. It shows always a filesize of 4,0 GB.
Upload doesnt progress after the actual filesize is reached (e.g. 48,0 MB), and will not be completed. No file does appear on my FTP Server.
After updating to version 3.8, I also experienced the filesize problem when uploading to my Amazon S3 bucket. (I never tried FTP.) So I went back to 3.7, and all is well again. I'm still using OS 10.5.8 if that might matter.