Re-learning Pd after a couple of years. Downloaded 0.43.4-extended, installed it in a Windows 8.1 machine. It runs, but apparently some or all of the extended functionality is missing. Objects including atoi, coll, button, and beatpipe (selected at random from the Floss manual list) get a "...couldn't create" message in the Pd window.
Ditto for a bunch of seemingly essential stuff. If I hit "About Pd" in the Help menu, I get "couldn't create" messages for things like bng, expr, del, and lgl, all of which are evidently used in the About pop-up.
Plainly there's something wrong with the install. But what?