Blogger is constantly fixing problems with FTP publishing, and more problems come up at the same time. Anybody who says that there is one problem, and waits for the one problem to be fixed, is assuring that the one problem won't ever be fixed.
FTP Publishing involves scripted communication with hundreds of different "servers" (with Blogger acting like a "client") all over the world. Each different server, being owned by a different company, will be different from each other server; and each server will have different problems, which make the the Blogger scripts progressively more complex. Sometimes, changes by the server owner to some, though not all servers, may make a difference.
And just because you were able to publish to your blog last week, that doesn't assure that you will be able to publish this week. Nor does it assure that somebody else will be able to publish today.
What all of this means is that anybody who insists that his problem has to be fixed by Blogger, and waits while Blogger fixes it, will possibly be waiting a good long time. Some problems will involve you, and some will involve your server host support team. Each problem really should be attacked by three parties, working together.
When you have problems, checking your settings, and verifying them against updated instructions from your host support team, is a good place to start. Maybe a look at the server access logs is a good idea too.
Just don't post your complaint, go about your daily business, and wait. Get to work, and get involved.