Bugs
It is very difficult to report a bug. The bug reporting page seems to assert that all bugs are javascript errors. Criticisms of design / bugs in appearance are still bugs. I expect a text box where I can type in a description of a bug and submit it.
This page should include a link to the 'report a bug' page:
http://www.zotero.org/support/
that page is quite clear on both "posting to the forums" and the types of details that are wanted/needed. It also says that "Not all problems will show up in the wizard".
I don't actually think bug reporting should be over-emphasized in the documentation: Most bugs are already known and/or reported and so it's not going to be helpful for people to report bugs when they haven't at least spend some time searching forums and documentation. This is not to say that bug-reports aren't helpful, but that encouraging unsophisticated bug reports probably isn't.
The support page links to this:
http://www.zotero.org/support/getting_help
which is a much better place to start for users with problems than the reporting bugs page. It also includes a note that login is required to post (though I agree with your other post that that isn't very clear or elegant - the site is currently being re-designed so that may improve)
IMO, people won't actually read text longer than about 2-3 lines.
But developers still read every thread.