There was a problem with the way one of the operations on the server worked. This was caught by two of the server tester people, and their reports were excellent, took me right to the problem.
It was a tricky one, because to make the change required a change in the client code. And the server had to work with un-updated clients and updated clients had to work with un-updated servers. And of course updated server had to work with updated clients, and in that case the bug is gone.
And it's all automatic! So there's that...
This will be the first such automatic update. And if it works it sets up a template for all subsequent updates.
v0.88w is the new version of the client software and v0.94f is the new version of the server. If you're running both those version and you are able to create and edit posts, then it's all working a-okay.