There are two kinds of pop-ups: The evil kind, which spawn unrequested when a page loads, and the relatively benign kind, which appear when requested (by clicking a JavaScript link). Virtually all browser-based pop-up blockers are able to distinguish between the two, so that sites that use pop-ups without devilish intent continue to work properly.
Over the past week, I’ve been getting email from a small handful of students informing me that the J-School’s course schedule was appearing as a blank window. Could not reproduce the behavior on any OS/browser.
Finally a student lent me her laptop, and sure enough, blank page. Viewed source and was horrified to find JavaScript in the page that I had not put there. Turns out she was running Norton Internet Security, which works as a sort of proxy server on the client, and literally rewrites web pages before they get to the browser, stripping page control from the developer. With NIS “Ad Blocking” enabled, the program is unable to distinguish between evil and benign pop-up code, and assumes the user would rather not see the page at all.
Had to order a copy of this POS today just so I can get started on work-arounds. Between this and recent discoveries of incompatibilities between Norton AntiVirus and both Final Cut and Pro Tools, am forced to the conclude that Peter Norton is no longer my hero.

