This is really bizarre. As the title suggests, can anybody give an idea of why the buttons are only there about half of the time? They were just there for about page 5 refreshes, now theyre gone again!
The theme’s fine. The problem is actually caused by a bug in our widgets (you’re using the Members list and the “Who’s online?” widgets). We’re tracking the bug here https://buddypress.trac.wordpress.org/ticket/5170 and currently aiming to fix it by the 2.0 release, which is probably 4 months away. If we get a fix before then, we’ll put it into a 1.9.x small release.
A workaround is to make sure that no BuddyPress widgets are rendered before the main content of the page. i.e. try moving the widgets to the right-hand column, or a widget area at the bottom of the page, or just removing the widgets.