fast/multicol/shrink-to-column-height-for-pagination shoves the green block way over. Could be a problem with the test case, so will need to investigate.
<rdar://problem/16656275>
This was fixed by the patches to pageCount() and pageOrViewLogicalHeight() in bug 131811. Adding a test case just to have more coverage.
Created attachment 229820 [details] Patch
Fixed.