This is just an FYI that may help some people out with a minor headache that took me a few minutes to sort out. I’ve seen other posts in these forums about it, but they’ve since been closed, so I couldn’t respond directly.
Every page (except the homepage) on my BuddyPress install returned a 404 Page not found error…
I was too stupid to realize I should probably enable AllowOverride All so that mod_rewrite could, like, do something.
I’m not sure if it’d help people out if BuddyPress did a “Clean Urls” check or something similar since mod_rewrite is required for it to work, it seems. It might help people through a headache like this.