While testing a _18 performance issue, I entered an infinite amount of text into the summary field. This crashed my browser, but only in Wiki's, not forums, assignments(online text) or any other activity. Simply, I copied a string of text "test test test test test test test test test test test test test" and copied and pasted it over and over again till failure. While there probably should be a limit, a warning was displayed(somewhat) in Internet Explorer, while Firefox just fails. Also in IE, I received a notification telling me the script can not be run, then it reports back as 'Not Responding' and crashes or freezes.