b5bbb2e created the issue

I was trying to transfer a slew of files from a NAS to my iPhone (using SCP), but every time I dragged the files, CyberDuck would crash. Until I removed the superfluous spaces.
Note that it wasn't logical single spaces that abounded, but double, triple and quadruple spaces, and spaces before the full stop (example filename .filetype)
I did not test extensively. Maybe this was the cumulative effect of having many such files.
If you have trouble reproducing, please write me an email and I'll do a demo and send you some example files.