You have to enable "Allow temporary slots use" (which is disabled by default) when you start a game of Ten Across. You can only place the Kings in the temporary slots.
This is the behaviour of Aiselrot 2.17.4 -- Bug in aisleriot 2.16.1 (ten across) https://launchpad.net/bugs/63733 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
