Running Lubuntu 14.04.
To reproduce:
Mount some SMB share (in my case, a WD Mybooklive Linux based NAS).
Select some files with spaces in their names, press CTRL+X (to cut these).
Navigate to some other folder on this share.
Press CTRL-V.
The files will be pasted there but their names will be mangled (space replaced with "%20").
This replacement should not happen.
The same thing happens when using drag & drop and also between a SMB share and an MTP mounted Android devices (for example).
Anonymous
This issue is fixed in LibFM version 1.2.1. Ask your maintainers on Launchpad to update it in Ubuntu, please. Thank you very much.
I still have this same issue when using WebDav.
To replicate:
1.) Install a WebDav server (like NextCloud or OwnCloud)
2.) Use Go>Connect To Server. Protocol WebDav. Path /remote.php/webdav
3.) All files have %20 insted of spaces. Modifying a file replaces the spaces with %20 on the server.
To check where the source of the problem was I tried Nautilus instead and everything worked as expected.
This same problem seems to reappear on Raspbian buster PCManFM 1.3.1. On Raspbian Stretch PCManFM 1.2.5 has no problem.