When you try to load assessment details for a given course on coursera.org, the embedded frame that supposed to hold the details remains blank. It shows up again as soon as you deactivate HTTPS Everywhere extension and relaunch the browser.
Google Chrome Version 22.0.1229.94 m
HTTPS Everywhere Extension Version 2012.10.31
Trac: Username: sofianeh
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I can't test this directly without a Coursera account, but the fact that a reload is required strongly suggests that this is a problem with part of the site not functioning if the cookies are secure. I'm therefore going to push 3.0.4 with the securecookie directive removed from the Coursera ruleset (this, by the way, is a dire security flaw that Coursera needs to fix on their end).
There's a chance that the problem with the ruleset is deeper, though, in which case 3.0.4 won't fix it.
OK, I've disabled the ruleset in git, so it should be fixed in forthcoming releases. In the mean time, you can disable it manually from the toolbar menu.
For some reasons disabling it from the menu doesn't help (in fact, I've even tried to edit manually default.rulesets file and completely remove Coursera's ruleset – with the same negative result). However, disabling the extension completely does help; take a look at this two screenshots:
(I also confirm that a "redesign of Coursera's platform" message has nothing to do with this particular problem, I've faced the same exact situation earlier, too.)