in 1.5.2

if you rename a folder on the server side and enter the folder and attempt to click on a folder
in that folder, you get a message from the server saying
No such file or Directory
 and reports a path using the old name

and the toggle above the directory shows the old name while the directory shows the new name

Refresh or disconnecting/reconnecting or moving up and odwn the folder hierarchy
does not fix this 

the only thing that fixes this is to quit Yummy and restart it.

then it starts using the new name.