No, the problem is that I can't stack those things, much less get to the point where I could unstack them.

Yep, now there's some things I can't stack, such as Subversion, Ubuntu, or Python, though I'm sure it's not just specific to those pages.

Everytime I try to click unstack anywhere in the web interface, it sits with the "spinner", waiting to get unstacked, but it never unstacks anything.