Have a problem with 1.8.4.
I use an alias for some folder names in the finder or on the ftp site to match names in the directory trees.
For example, my local development server may have the web root at htdocs, and the ftp site may have the web root at public_html.
An alias (either Mac or Unix Style) of public_html that resolves to htdocs on my local system would keep the local and ftp browsers in sync in 1.8.3 and previous versions.
1.8.4 does not seem to follow or link the aliases between the systems.
I do not typically synchronize, so I don't know if that is also affected.
Also just found that it fails to follow an alias on the remote system.
i.e. a remote symbolic link of a folder with permissions set correctly will not open in the ftp browser side.
in this case the folder the symbolic link points to is not within the containing folder structure. It is elsewhere on the server, but is a valid link, and follow symbolics are allowed.
This appears to have been broken on 1.8.3 also, but I hadn't used it for a while.
This was a feature that made Yummy stand out from the rest.