Okay, here's what seems to be broken: 1) cond, as Mike observed. This is related to the different expansion of cond. 2) make-foo, where foo is a user-defined structure. There's a mysterious extra "false" that's showing up. 3) reduction of (cons 1 (cons 2 empty)) in beginner only. 4) local structures.
Apparently, all of this (except for #4) changed in the last week :). John
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