URGENT CRITICAL REGRESSION: cannot handle utf8 filenames

[php4fan]

After a recent update, it has become impossible to interact with a server where there are files that have utf-8 filenames containing characters such as "ñ".

Steps to reproduce:

• connect to a server where there are such files

Expected: such files should be listed correctly
Observed: the filenames are shown with random garbage characters

• Select files on the server having filenames containing an "ñ"
• try to delete the selected files

Expected: should work
Observed: fails with a nonsensical error message more or less like "no such file or directory". Probably because FileZilla is asking the server to delete the file with the wrong filename (and hence the error message from the server is legitimate).

This used to work fine.