Stanford-Online/class2go — pull request #1153 by sefk (2012-10-19 23:54:13+00:00)
Title: (to master) Revert problem set progress perf enhancments (#1024)

This reverts commit 474bde0174e07e0a7dace9a66d07a6cbc5bd7c90.

Counterpart of pull request #1149 (to prod)