The "wipe method" under "Screen options" has its options listed incorrectly.
Starting with "top" the wipe method actually seems to be a duplicate of "crossfade." Following this, each item in the list is in fact the item that appears on the list before it. eg, "Bottom" is actually "top," "left" is actually "bottom," and so forth, finishing with a final option of "invalid" which is actually "doors."
Gotcha, sharp eye -- will fix this for 2.1.0 Test2!
Fixed in yet to be released 2.1.0-Test2.