This has been a major bug affecting our users for the past few years that eluded us until now. Any application that depends on using jQuery to trigger keyup events manually will encounter this problem, since so many users are installing this anti-keylogger software when they setup Comcast.
The patch we've already implemented and has done tremendous to reduce the number of tickets reported by customers just in the past few days. Could you consider escalating and add the patch in for the next jQuery release? Many thanks!