I'm using the F18 TC4 version of anaconda. When creating a custom partitioning scheme, I noticed that in the ADD A NEW MOUNT POINT (why the shouting, by the way?) dialog, the drop-down prefilled options are /usr and /var. But, as of http://fedoraproject.org/wiki/Features/UsrMove, we don't support /usr as a separate partition, so we should not offer that. In fact, we should maybe find some way of telling people that this would break? As a separate but related note, maybe we should provide options for common separate partitions /opt and /srv?
I've sent a patch for not offering /usr (replaced it with /srv). As for preventing somebody from creating a /usr/ mount that'd be a different bug (but I'm going to glance at seeing if this is a quick fix or already done).
So, actually, reading that feature, /usr could be a separate filesystem. In fact, offering /usr was added because of bug 815264 So if /usr as a mount point doesn't work, that should get filed as it's own bug and made to work. I'm going to close this as NOTABUG in the mean time.
Oh, good point. Thanks. :)